Hi there! I'm happy you've reached out for help. I hope my input can be useful for you.
You should be commended for having such a clear awareness of your physical and mental reactions and changes when dealing with same-sex and opposite-sex friends. Good awareness is the first step to making positive changes.
When you're facing the same situation, try to notice what's behind the physical tension and heart palpitations. What experiences and feelings have you not felt at other times during your growth process? For example, what were your feelings and experiences when you were growing up with your father?
It's important to understand your anxious, sleepless emotional state. Don't avoid it, reject it, or deny your emotional feelings. If your anxiety and insomnia are causing you a lot of pain, you can try taking deep breaths to relieve the harm of emotional intensity on your body and mind. This will also help you to better experience and feel your emotions and explore the hidden needs behind them.
You can also keep an emotional diary to record your emotional experiences in writing. This can help you to better experience and feel your emotions, become aware of your emotions, and explore the needs hidden behind them. This way, you can seek better responses and ways and methods to satisfy your needs. For example, you can try to relieve your anxiety through relaxation training. Or, you can try to gradually face the situations that make you anxious directly through desensitization. You can do this at a weak level and gradually increase the intensity until the situations that make you anxious no longer make you anxious.
I'm Lily, the little ear of the Q&A Museum. The world and I love you.


Comments
I can relate to feeling confused about these new emotions. It's okay to experience a range of feelings towards friends, which doesn't necessarily define your sexual orientation. Sometimes strong friendships can stir intense emotions.
It sounds like you're going through a lot emotionally and it's perfectly normal at your age. The excitement from making a new friend and spending active time together might be causing those heart palpitations. Maybe give yourself some time to process these feelings without labeling them too quickly.
The sensations you're describing could also be due to the thrill of forming a new friendship and the physical activities you were engaged in. It's natural for your body to react this way after sports and games. Just focus on enjoying the connections you make with people.
It's not uncommon to feel a special bond with close friends that can sometimes be mistaken for something more. This doesn't have to mean anything about your orientation. Try talking to someone you trust about what you're experiencing; it can help clarify things.
You seem very selfaware, and that's a great quality. These feelings might just be part of growing up and figuring out who you are. Consider exploring these feelings further, maybe through journaling or speaking with a counselor, to understand them better.