How do I get over someone? (Complicated - read further)?

So I'm a girl and I came out of the closet recently and one of my best/family friend's cousin was one of the first I talked to about it and she's gay too and lives pretty far away from where I do. I visited her about two months ago and we ended up kissing and it's very rare that I ever have such genuine romantic feelings for someone but I do for her. I have since the first time I met her(around last thanksgiving and xmas) and those were the only two times I had seen her before I visited her. It was just one of those rare things where you automatically connect with someone right away for no reason. I'm twenty and she's twenty-five so there's a bit of an age gap. I'm the youngest she's ever kissed I guess but I have always been told I am very mature for my age. We mutually agreed at the end of my visit that nothing would happen between us for numerous reasons, just being in different places in our lives and especially with me not being experienced whatsoever. She's gotten drunk and texted me about how she finds me so incredibly attractive, and I know she's really into me, but at the same time she's mature and responsible and won't let her heart get in the way of her head I guess you could say. About three weeks ago she mentioned to me that she was "kind-of" dating another girl that also lives far away from her? Definitely hit me hard ha, just 'cause I don't really have genuine feelings for someone very often... at all. I feel naive in the sense that this would be something real and special. We text every couple days, and one time I didn't reply(although I usually always reply with lightning quick speed lol) and she posted on my facebook wall asking why I wouldn't respond to her. It's difficult because I feel like I'm coming on strong to her, just by being honest, and I just feel like I can't "play the game" because I feel like my heart's on my sleeve for the first time. I'm not naive, it isn't because she's the "first girl I kissed". I had these feelings even before that. But now I can't stop thinking about her. I'll see her in a few months and lately(this past week and a half or so) we haven't been talking much but she's on my mind 24/7 and I want to delete her off my facebook because I won't be constantly checking it or reminded of her, but then again I don't want to be rude and immature. It's also difficult because she's the cousin of my very, very close family friends. I feel like it'd be the mature thing and better for myself to stop communication with her, not exactly stop, but limit myself so that I can move on and focus my attention elsewhere because it's distracting my everyday life. If she asked me why I deleted her, I'd kind of just want to be straight up and say "I'm sorry, I didn't intend anything insulting by it. I'll just be completely honest - I think about you, and I know nothing's going to happen between us, but I just feel like it'd be better for me in the long run to get over you." And I guess I hope she'd appreciate my honesty, but then again is this overreacting and juvenile? Me being so blunt about me liking her, having to delete her on FB, etc. would also I think be a surprise to her that it's gotten that deep to me. I'm not sure if that's a vulnerability that would be wise to show or if it would completely kill any possibility of a future shot with her. I might even be doing a semester(spring) where she lives and she potentially might be moving back to the same state I'm in. She likes my photos and things on my wall, and to put it bluntly, it's annoying because everytime I try and stop thinking about her she pops up again. Ha. Should I just suck it up and not do ANYTHING and just grin and bear it and not delete her and just try not to talk to her(although I'm sure I will be tempted to 1000x a day) or what?!