<human>: Can you condense the text into three sentences or less?

It's something that makes me quite angry at myself... and I can't seem to find other explanation than me being dumb.

Once one of my girl (space) friends has officially admitted she likes me, the way I look at her changes. I start putting defects on her and try to avoid her, I'll go far enough to feel (I'm so stupid...) nasty about them, what the hell??

I'm 100% sure I'm straight, I do feel like I wouldn't be able to be on a relationship though. It takes too much time and all the messages and cuddling part doesn't feel good to me. 

Could it be that when a girl I REALLY like likes me back, I'll get rid of that stupid trait?

Still, it's not cool to start putting defects on girls that are interested in you and I'd like to know if anyone relates and where the feelings come from.

Please, present me with a serious answer and respect the fact that this is how I feel in the situation, as idiot as it can seem...
<bot>: When I know a girl likes me I put defects on her and even feel uncomfortable with her, feeling like avoiding her presence. I'd like to know where that feeling comes from.