I've been dating my girlfriend for two years now, and everything except the sex has been amazing. I'm 27 and she's 23, and we're looking forward to a long term relationship. The problem with the sex isn't that it's bad. But she's just really out there. It's like what we have isn't good enough. At the beginning, she started flirting with guys. She told me she's just friendly, that's all. Then she really started flirting with my friend. One day it went far and she pushed for a threesome. But it ended up being them mainly. She said it's a threesome cause I was there. After that she took it too far. We crashed after a party. She ended up giving him a blowjob at night while I was asleep and they had sex in the morning before I woke up. I don't get it cause our sex is actually good. I'm thinking she has an issue with attention. Now she's started wearing very revealing clothes, more than before. Even after we agreed to stop all this stuff, it's been tough. She invited me to her cousins wedding, but the whole night she was flirting with this guy. Then I caught her making out with him. What pisses me off is now she didn't even consider that cheating. She even brings up how she makes out with guys at parties and that it's just making out. What other option is there than breaking up?? I don't want to cause everything else is good.