Search Results: casual or serious dating

Should I take my ex back after he left me in the first place for his ex? Or should I just leave it alone and stay single?
Well... My ex left me for his ex girlfriend and now he wants me back. Let me start by saying that I'm only 22 years old but I'm very mature and I am looking for very serious relationships, not casual dating. We dated for about 6 months but we've lnown one another for about four years (we were on the same college track team). The last month of us things got a little rough between us and but we decided wed work things out. Two days later he text me saying that he just wanted to be friends. Me being me I simply said okay but I feel like you're leavinf me for another girl. Come to find out he left me for his ex girlfriend. And the entire time we were dating he constantly claimed that he had unfinished business with her (whatever that means). I saw that it was over between us, and when I see that in a relationship just cut the guy of iut my life and move one. Well he came back two months later wanting to apologize and get back together. I forgave him but didn't want to be friends. But we kept talking after that and now we may be trying to work it out. I have a lot of self respect for myself so that's not an issue. But I have zero trust in him now and I want stability in my life. I also don't want to worry if he will leave me again.

So, I have never been the kind of girl to get serious. That's not to say that I haven't, I just prefer casual. I'm good at casual, comfortable with it, even. But I met this boy at university, and well, the first night he drove me home, and slept in the bed with me though nothing happened because I was two drunk. Fast forward a few days and we are hooking up- at first it wasn't great but he improved a lot to meet my tastes. It's been almost a month now and he's dropped the L-bomb and I've met his mother. Unfortunately, he recently got a concussion from rugby and he's been a bit of a bear- not texting, grumpy, etc. He called me from the hospital and I went to go stay with him.
I've met his friends, and the sex is (ball-slappingly hard and) great, and I really like him ( a lot), which scares me to no end. We've decided that we'll "cross that bridge when we get to it," because I told him that I tend to run when things get too serious. I don't know if I want a relationship, but I do want him... He makes me laugh and I'm happy around him, and he's said that he's happy around me. But, I'm worried that we might be cooling off because of school work and is that bad? I just need some clarity, any help at all would be greatly appreciated.

Also: He kissed another girl while still dating his last girlfriend, which worries me, but he seems sufficiently contrite. Another reason as to why I might be a tad hesitant!