<human>: Can you succinctly summarize the text in 1-3 sentences?

So a good friend of mine(20/m) of almost two years,
 asked me(19/F) to be his girlfriend. It was overall a very nonchalant proposition for him. I, having not ever dated, was kinda flattered but at the same time didn't feel much about it, perhaps it was because of the way he asked. 
The thing is, we hang out quite a bit and people have often asked if we were dating, so at this point he's just like "we might as well."  So I was like "yeah. Sure." Then he did a little gesture from show we watched to kinda make it our thing? And then he leaned in for a kiss and it wasn't really a kiss but more of like a face touch but that kinda set off a weird, slightly disgusted/unpleasant feeling in me. Later I told him that's I'd need more time to think.
And so now I'm here. Okay one thing to mention is that I'm mostly closeted bi ( he doesn't know) , but leaning more towards girls. I think that may have contributed to the off feeling I had. So now really all I have to say is no to him. I'm not really sure why I haven't yet... But now I get that unpleasant feeling whenever i am reminded of him and I don't know if I can hang out with him like before anymore. Why do I feel this way and is it bad that I do? It feels like a petty reason to lose a friend over.
<bot>: My friend asked me out, and tried to kiss me. It made me uncomfortable and I'm not sure if I can hang out with him anymore. Am I wrong for feeling this way?