<human>: I'm a 17 year old (Male) who has recently graduated High school. One of my closest friends (17/F) (of whom I had a crush on at the time) confessed her feelings for me before I confessed that I felt the same way. So for the later half of last year I was in a (unofficial) relationship with this person. During this time, our feelings for each other had only strengthened, and I was in love with her. 

Near the end of the year, without mentioning how she felt about me, she asked if we could just be friends - because she felt that it was slowly destroying our friendship, and that she thought I was feeling "forced" into this. I agreed that our friendship was quite valuable and important, but I told her that I didn't feel "forced" in any way at all. So since then we have been close friends as before.

I am glad that we remain really close, however, I still have feelings for her. I still have no clue what her feelings are, and I'm worried that if I were to express my true feelings for her, it would ruin a perfectly good friendship.

I would be really happy if anyone can give some advice on what I should do.

Can you summarize the given text in a few sentences?
<bot>: had an unofficial "thing" with a close friend, went back to being close friends, still have feelings for close friend.