You can offer advice if you want, but I'm going to do what I want regardless, so if you don't want to waste your time, then don't.
I'll spare you the exact details, but here is the gist:
Take the time to Friday night, a girl I have been hanging out with a lot texts me that she wants to hang out tonight. She is at work now but will come back tonight if I want to chill (we both live in dorms, but she her parents have the house near where she works), I find this odd because she is going to drive her tonight and then have to drive back all the way to her house in the morning from campus (she lives like 40 mins away). Hanging out hasn't been anything than us studying or playing a game occasionally at this point, but I didn't have other plans so figured why not. One thing leads to another and she winds up sleeping over (we didn't do anything, but it was in the same bed), it's also worth noting that she initiates at least half of it, and she made the initial move. Come morning I get a text that we need to talk, so she tells me that this wasn't supposed to happen and she has a boyfriend (I didn't know this till now). I say that she [censored] up and say nothing for the rest of the night, proceeded by her texting me 3 times and then calling me 4 times (I never answered or responded, I didn't feel like dealing with it). At this point I am going to meet her today and talk about it, but I'm pretty pissed. I would have been fine with being just friends or being in a relationship AND SHE DOES THE ONE [censored] THING THAT MESSES UP BOTH.
I'm generally a very mellow / indifferent person, but this has me pretty pissed. I can't think of the last time I was more than annoyed at something.