How do I feel more comfortable about my sexuality?

[Finch]

I'm 16, and I know that I'm gay. I'm not going through a change because I've known I was gay since I was 12. I've been keeping it hidden for so long because I simply don't know how to do deal with it. I just get so depressed when I think about myself not being straight, and I know that sounds dumb, but I'm being honest. Some times I act feminine, but I quickly try to cover it up because I don't want to show it. My Mom is very supportive, but I would still feel uncomfortable telling her mostly because I can't even deal with it myself. Do you have any advice? Thanks