What to do when a girl needs space / says she needs time to fix up her life?

I've been seeing this girl for a little while and every time we'd go out, everything would go perfectly. There's never been a dull moment and we really got a good chance to know each other. We'd go on coffee dates, to the movies, I'd make us dinner, more or less things were great. Recently though, she got slower with talking to me, then stopped a few days. Typically I'd text her only once or twice a day, nothing too much.

Anyway, after a couple days of not talking, I hit her up on facebook asking why we haven't been talking so she said that she was sorry she didn't tell me, but she had to clear her life and that something happened that she has to take care of.

I didn't bother to ask what it was, I only told her that she should take her time and that if she ever needed anything she can message me whenever she's ready.

Recently she's been posting a lot of things to this other guy's wall on facebook though. Not message or stuff like that, just inspirational quotes and stuff like that. I have no idea if the guy was her ex boyfriend or what, but he's always posting statuses about how he's depressed. I don't know if this has anything to do with it, but I just really don't want to lose her.

I just want to know what was the best thing I should do. We're 18 and 19.

I was thinking of just leaving some flowers at her door sometime this week with a note that says

"I hope I'm the first person you thought of" ~ Mike

I just don't want to smother her. Let me know what the best thing to do is. Thanks!