Is it normal that i am just no longer comfortable around her?

We have been friends for about two years or so. About six months into our friendship, she told me she thinks of herself as bi sexual and that she is in love with one of her friends. Things basically didn't work out between her and her friend because she is straight. They lost contact after that and she started to move on from it.
So about a year into our friendship, I started to pick up signs from her and told myself to stop being silly, she's just my friend and she thinks of me in the same way. But I recently spoke to my mother and a few friends and they're convinced she likes me. She texts me all day, every day without fail. No exaggeration. She doesn't text her other friends as much as me at all. The other night she went out and got drunk. She insisted on ringing me. I asked why and she replied with fine then I won't. I said I meant no offense but I thought you were out with your friends? Aren't you busy with them? And she went hmm I guess so. When I go on a night out with friends, I never use my phone. But that night she was out, she was bombarding me with texts every five minutes, even if I did not reply. She then started texting me saying she likes someone, but I'm not allowed to know. Come on, that is behaviour of a 5 year old. She never talks about this person in question when she's sober, which friends usually would do. And when she was drunk and I asked who this person was, I'm apparently not allowed to know, which friends don't tend to hide from each other. I was talking to her about a man I used to like, until I found out he had a girlfriend so I decided to back off a bit. She replied with well we all want someone we can't have don't we?
I have made it pretty much clear I like men only, and I think that's what holds her back from directly telling me. Plus the last girl she told that she was in love with her destroyed their friendship. I have nothing against gays of bi sexual. I went through a stage in my life were I thought I could be bi sexual (I'm not), it's just now I am not longer comfortable around her, as awful as it sounds. I KNOW she won't try anything on with me, but I still feel awkward and uncomfortable. And how would a friendship last when she has more feelings for me, which will never be returned? So is it normal I feel totally uncomfortable, creeped out and don't really want to sustain our two year friendship anymore? I feel like an absolute bitch for feeling like this but I just do.