Well, I feel like being destined for failure isn't necessarily a bad thing.
I've only been in I'd say 2 relationships that I would have wanted to Succeed in the Long Term.
Its hard.... you know, when you get attached to someone but, I think its better to not be in a relationship than to endure a stupid one, simply because its better than being alone.
I'm single right now and have been for... a bit. BUT, when I'm in a relationship I tend to pour a lot of time energy and effort into getting to know if it has the capacity to work and to last. Which is why my relationships either last about 3 weeks or more than a year. Not a whole lot inbetween.
Also its kind of a CODEPENDANT thing to try and make a terrible relationship work. If you are having to jump through hoops and sing and dance, just for things to be OKAY, how are either of you ever going to be happy? Making someone else happy is impossible if their internal compass doesn't point naturally to being happy.