My girlfriend is in an anorexic treatment center.. (just a few relationship ?'s)?

She's already been in for a month, she still has 2 or so left, and I communicate with her through mail once a week, she's called once, and I might go visit her soon (It's a 2 hour drive), so I do still have contact with her, and I don't know if I "love" her, but I do know that I've never cared so much about any girl like I do with her, and I mean I'm only 17, and the whole anorexia thing stresses me out sometimes because I feel unhelpful, and I mean I'm just looking for some advice really. My friends have been calling me "crazy", "soft", "foolish" for still caring about her and not moving on to someone else but am I doing the right thing? My friends have been telling me once she gets out she won't bother with me, and other things similar to that, saying that I'm going to college and I'm wasting all my opportunities because of her, and I'm just really torn. Because I do really care and I hope that she appreciates all of it, but if I get thrown aside like nothing that would really suck, you know? So I guess my question is am I doing the right thing? Or are my friends right and i'm being foolish/gullible believing that a girl (her being 16) is gonna come out of treatment back to her boyfriend after all that happened? I mean I always here about teenage girls changing their minds like that and I'm just stuck..