Break Up & Divorce

My "girlfriend" deleted me from facebook today?

As so I have been with this girl that is 17 for about a month now. We talked for 2 months before we got together. I'm 20. She acts really sketch sometime, which her age explains. Anyway I meet her through my old roommate. He was kicked out of school and had to move. 2 Months before he moved she came on to me. Added me on facebook and flirting with me telling me she wanted me. Now I'm not the most handsome guy. at all. And I haven't had a girl in like 1 and half years. So, when this little young 6'3 witha rockin body I wanted to tag it. After 2 months of her keep trying to talk to me and me not believing that she was into me and me telling her she is just blowing smoke up my ass hole we got together. The whole time we have been together she has kept her ex as her boyfriend on facebook. It wasn't until last week when I was finally able to take her on a date. But it really wasn't a date we got lunch together and she wouldn't let me pay for hers because she said that her dad would ask her where the change was. Made sense so I just said whatever. She has had her ex stay at her house a couple of days about 2 weeks ago and she didn't tell me about it. I found out because he had to pick up some of his stuff from my place. Anyway she was suppose to come by Friday but didnt.
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And she hasn't been texting me like she normally does. It takes her like a hour to respond. She normally bugs the sh*t outta me. that started last night. She said she had to pick up her little sister from school because she was sick friday.
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Then she deletes me on facebook. Finally my question...Should I text her asking her if he is over at her place? I want to just break it off, but I don't want to look like a pussy. Plus she says she wants to "do it" monday.
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But she said the same thing the first time he was at her place. I want to so bad but I'll be damned if I get sloppy seconds from my own damn girlfriend. she is always talking like she wants me in her life. Asking me to go to her grad parties
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and graduation. But she does sh*t like this...Should I ask her if her and her ex are still together I've asked this before but she says no. I have no real idea what the f*** is going on. If I break up with her won't it look at over a text and no
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concrete reason?
My "girlfriend" deleted me from facebook today?
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