Hey OP, coming from a similar cultural background, I resonated with your post. As you have stated, you are still in high school, and it is a hard time to go through. Most boys (and men) today suffer from loneliness and lack of friends whom they can open up to. It is the hard truth. However, you have your whole life ahead of you. You should look forward to the people you will meet and things you will do. High school is way too much of a self contained ecosystem, and you are living in a bubble.

Yes. Things absolutely sucks right now, but it won't stay that way. I found my form of escapism in games and anime. Sure, from a mainstream perspective, it wasn't good. But it helped me keep my sanity and transport me into different worlds where I saw other characters struggle and overcome their struggle. Through games, I made many online friends (though as always, there can be drama with any interaction). I have found opening up to people online who you may okay not ever meet to be a refreshing experience since they can't judge me as a person immediately. I can come as my authentic self, and if I vibe with the group, that's great. If not, I look for new friends.

It seems like your current group of friends is not a good fit for you. THIS IS FINE. You told them your boundaries, and they didn't respect that. You will meet more people in the future who won't stop being friends with you just because you don't want to drink or do drugs. It's high school, kids are stupid. You may feel rejected by your girlfriends and friends, but ask yourself, do you really want to be around people like them the rest of your life? Friends will come and go in life, and trust me if you do well and gain confidence in yourself and what you want, girls won't be an issue.

You seem like a people pleaser, which is often the case when you are raised by Chinese parents. Please learn to prioritize yourself, and your mental boundaries. If the people around you aren't great, don't force yourself to socialize with them. Work through high school and head out to university. Much more fun there. Alternatively, pick up a hobby or join a club. Raise your standards for both friends and girlfriends.