Relationships, are they worth it?

I admit that I'm a bit of a hopeless romantic, I like the idea of finding someone at university and for that to be it, but i've started to think this is very unlikely to happen. For one, i've not had a relationship in which I think "I wish that never ended", as they've all turned out to be quite rough in the long run, for instance cheating and recently worse. All of my relationships have ended up in either one or both of us being hurt, hence this is why the question I'm asking is are they actually worth it? Also, each relationship changes me as a person, I now find it a lot harder to trust people after recent events, but maybe this could be a good thing? It's made me put a barrier between me and new people, and i've evidentially got ever lasting scars, inside and out.  

I will never forget anyone that i've been with, mainly for bad reasons. Of course there where good times, but they've slowly been forgotten. I find it hard to commit myself to one person in the first place, but when I do i'll be fully theirs. I've never cheated or caused any harm, and I certainly need to find someone who'll treat me with the same respect.

It is clear that I haven't yet found the right person, but how the hell do I find them? Maybe i've already met the person, who knows? Movies seem to give the wrong impression to the media and women around the world. Of course, I have certain friends who I can tell will get married to their partners, I know this incredibly hard to find, especially since they're with their first love. Marriages these days mainly end in divorce, a complete contrast to back in the old days. It just makes you wonder!

I need someone to find me, blow me away and love me for who I am without trying to change or control me. My bad relationships have certainly made me be critical about love, hopefully someone will make this change, otherwise when I'm older i'll be purchasing a dog and staying at home...
If you're up to the challenge, please step up :)