Breakup advice needed

Hey everyone! I need some advice on breaking up. It's kind of complicated... But anyway, if anyone would like to help me, I would appreciate it. Just so you know, this isn't some high school love/crush (not that I have anything against those, they're really cute), I'm 20 years old, so we're talking about a serious relationship that involves commitment...

If you think you can help me, you can inbox me to have the details since I haven't written any here. :)