Each relationship that I ended were ones that I wasn't happy in for whatever reason. It might of been something as simple as we didn't see eye to eye on a lot of things, or we may had fought a lot. I even ended up dating someone who cheated on me (I def wasn't happy with that!). If you are in a fairly new relationship, then it would be best to end things. If you aren't happy now, you probably won't be happy 10 years from now. You could find someone so much more suited for you...someone to make you so much happier. If it's a marriage, kids are involved, or something like that, then I would try and work it out first. Maybe see a relationship counselor or something.