<human>: There is this girl (2 years older, I'm a 19 year old boy) who started liking me a couple of years ago. Now I'm a very shy and introverted guy, so I let her be for that a while. Only when her texting became so obvious I couldn't go around it anymore I waited for the right moment and rejected her as carefully as I could. One thing I still regred though is that I did this by sending her a text message, though that was just our main way of communicating. She seemed to take it well.

Now 1,5 years later I begun to suspect that she still likes me and this was confirmed by some friends. Sadly she is having quiet a hard time right now (stuff about her personality), so the last thing I want is to hurt her now. At the same time I just cannot help her, scared to give of the wrong signs.

Now I know I'm just too sweet to others (I get told that very often), but I don't know what to do anymore. All I know is that a relation with her wouldn't work from my side, but still I care way to much.

I have looked for simular problems on the internet, but I don't seem to see any. Pls. help me out!

Condense the text into a few key points
<bot>: Girl I rejected 1,5 years ago still likes me, but I feel like I cannot her now when she not feeling well. What do I do?