17 year old needs help please. Long text.

Hey guys. I'm 17 and have been in a bit of an awkward state for the past year or so. Let me just start out from the beginning. I've always known that I was gay, but It was never really an issue for me. I had a crush on a boy in grade 3, and since then I've always known that I simply wasn't into girls. However, now that I'm in my senior year of high school, everything is becoming tougher. People are asking why i've never had a girlfriend, my parents are wondering who i'm asking to grad, but the truth is, is I'm gay. This is actually the first time I've told anyone with actual confidence that I'm gay. I told my mom when I was 12, but that's a story for another day, and If anyone thinks It would help my case then just say it in the comments. Anyways, it's been getting a whole lot harder, because now it's like I'm expected to either be out or in the closet, but I just can't. I don't have the courage. Some days I feel like i'm ready to come out, but then others I feel like climbing into a shell. I see people my age all the time saying how proud they are to be gay and posting pictures of their boyfriends or girlfriends, and I just sit here on instagram feeling like shit because I don't have any of that, because I'm in the closet. Another thing that isn't helping my "coming out case" is that I don't fit any stereotypes, whatsoever. I'm not feminin (except for the liking guys part, hehe), I play video games like all the time, and I mostly have guy friends. The main point of this all, and I'm sorry this post is all pretty jumbled, is that I don't know how to find the courage to come out, and I need help. This feels good getting this off my chest though, as I have been in fear of this since grade 9, when people were getting boyfriends and girlfriends for the first time. Please, if someone can simply help me out, I would really appreciate it. If anything needs clarification, or you would simply like to know more about my weird gay story, just ask. Thanks!