So unhappy/depress from lack of parents? I'm in my 20s already.?

I came from a very dysfunctional family. Every now and then for the past 4 years (after I finally got away from my family) I would cry thinking how I don't have anyone who loves me unconditionally. I don't know why but I have this strong desire to be loved my someone unconditionally in order to be happy in this life. About 4 months ago I started dating this guy and made me really happy. But about a month ago, I screwed things up. Took me about a month to patch things up and I think we will finally get back together. But that's when I further realized that the kind of love we often experience with our partners is not 'unconditional' which made me really sad...I wish I was more like other people who can live through this but unfortunately I'm not...what do I do? why am I like this?