<human>: I've liked a girl for a while and recently I've got the feeling she likes me back as well. 

Since I've started to get hints that she likes me back, I've began to lose feelings for her. I've never been in a proper relationship before and I don't know why I've suddenly lost all feelings for her. 

Could it be because I'm nervous about being in a relationship, or is there another reason? Any of you experienced this before? 

The girl is very attractive (probably a bit out of my league haha), good friend, smart and intellegent. She's perfect for me so I don't know why i feel like this. 

Please help!

Can you condense the text into a few key points?
<bot>: When I got signals back that this girl liked me that I liked for ages, I began to lose feelings for her.