The direction of logical thinking is clear.
You are sensitive and clear-headed. You don't blame your husband for the current situation; you recognize your own role in it. You are facing the problem head-on and working to find a solution based on your strength and independence. You know that "what to do" is different from "what happened." You are confident that you will find the answer and improvement to the problem in time.
Everyone knows that trying to improve oneself to adapt to the environment is more feasible, practical, and effective than trying to change or demand that others conform to oneself.
Lack of love is not a reason to demand it from others. It may be due to character, but that is irrelevant.
As you said, your husband has tried to give you love and satisfaction. Perhaps he is tired, or his love has faded, and there are times when things change or even become unbearable. It is not the case that he "doesn't love you enough," as you think. In fact, all couples cannot maintain eternal passion. It is more likely to be restrained warmth or even heavy family affection.
If you insist on a rigid standard, it's not an objective or helpful approach. It will push people apart and worsen the situation because passion will subside and love will wear thin. Being together requires that both people are comfortable and find it beneficial. You understand this, and realize that it may be more of a deviation in your own feelings. It's not that your husband doesn't love you enough, and going out is not necessarily flirting. Unreasonable demands and expectations are not helpful and cannot be sustained.
Passivity and fear only make things worse. Marriage requires a positive attitude.
Everyone needs security in their relationships. This security comes from the details of life and the little things your partner does and says. You need your partner's care and actions to confirm your feelings and the evidence of their love. However, marriage is not a relationship. You have already made the most important choice and commitment to love each other for the long term and in a stable legal relationship.
The future is what matters. Enhancing and maintaining this emotional relationship is far more practical and beneficial than repeatedly and continuously looking for evidence of love.
Since it is a union based on love, there is no reason to adopt a skeptical and negative stance. You know that the same thing, based on different starting points, will lead to completely different conclusions and feelings, and will result in different attitudes, words, and deeds, which will also exert an influence on the other party.
Then, more often than not, what you fear will come to pass. If you don't believe, you can't believe. This isn't about being blind or self-deceiving. It's about having the right attitude and stance for getting along with others on a daily basis.
Individual independence requires acceptance of the fact that everyone is lonely.
There will be couples who fall apart and there will be fickle emotions. But if this happens, will it change because of your fear or doubts? The truth is that no one can guarantee anything. Not just your husband, but you too.
Therefore, relationships and marriage are not inevitable or necessary. They are just a matter of fate and luck. Everyone is on their own life journey, and friends, family, and spouses are just fellow travelers by chance. There is always a chance that others will leave, and the possibility of loneliness for everyone is always there.
This is not inevitable or absolute, and it is not even a likely scenario. However, you cannot deny this possibility, and you cannot deny that only you can walk the path of every person's life. As mentioned before, being out of control and afraid of the unknown cannot ensure the future. Instead of asking for guarantees or evidence from the other person, it is better to be grateful and enjoy the days together. What I mean is to be vigilant and avoid your own "suspicion," which may one day really create ghosts.
You must recognize the loneliness on the road of life and accept it. This will enable you to take a more independent and objective stance towards the possible comings and goings of others and environmental changes. You will then be able to strive for and maintain the desired relationship in a more positive and beneficial way. This will satisfy your need for love, rather than relying on others for a "proof" that may even be harmful.
You deserve happiness.


Comments
I can understand feeling so insecure and lonely, it's a tough place to be. Maybe focusing on building a support network where you live now could help fill that void. Surrounding yourself with friends who care about you might bring some comfort.
It sounds like your past has really shaped your feelings of insecurity. Therapy might be a good option to explore those feelings in a safe space. A therapist can offer tools to cope with these emotions and build healthier relationships.
Your concerns are valid, and it's important to communicate openly with your husband about how you feel. Sharing your fears and insecurities may help him understand you better and reassure you of his love.
Feeling distant from family can be hard. Perhaps setting up regular calls or visits with your relatives could bridge that gap and make you feel more connected despite the distance.
It's understandable to feel threatened by situations involving your husband and his female colleagues. Establishing clear boundaries together and discussing what makes you uncomfortable can strengthen trust between you two.