Hey, obviously im new to the forums. Im 16 (or at least turning 16 in a matter of 2 weeks).
I recently started seeing my social life going down the drain, and realized that I had no game whatsoever! But I have began to change some of this.

I want to start by saying that im trying to get into a romantic relationship with a close friend (and I know some of you may find this pathetic) who ive known for about a year and a half. Im gonna reveal my feelings to her (because ive been hiding the fact that I like her). I havent seen any recent signs that she likes me and if things go wrong, and she doesnt feel the same way, I want to NOT go into a funk, and maybe focus on other girls for a change. I just want to be prepared forthe worst.

I also deal with AA, and its not as bad as it used to be (i started forcing myself to approach cute girls around the beginning of the school year, and have a short conversation with them).

im really horrible with girls to tell the truth, and I'm completely fine with striking converation but when it comes to flirting, and picking up her #, I just suck. so what are some ways I can improve this?

START A JOURNAL, cold approach, go to parties, write about all of it.

I look forward to seeing you around once you're ready to focus on new girls.

Do not,EVER, explain your feelings to a girl. Actions speak louder than words. And really,I've never met a guy who's had a positive reaction from explaining his feelings.
What you can do is escalate. Start being physical. Show that you are a sexual creature.She may get attracted,or you may get rejected,but still- atleast there's chance of it happening.
I would also advice you on going for other girls. Look at NorwegianDJ - he is never chasing only one girl. Abundancy is key.

Sound advice above.
I repeat that you shouldnt say how you feel. Just take action and show her through your eyes, smile, and touch, that you like her, and go for the kiss.
Do not go for only one. It fvcks you up emotionally. Trust me.