<human>: Could you distill the essence of the text into 1-3 sentences?

At my age, you would expect to have one relationship that has lasted longer than average relationships. The issue is, I have never had the fortune to learn about them. I chose many of bad apples who used me by playing mind games and I was too stupid to realize it. My longest relationship was 5 months, and none of the guys I dated before were serious about the relationship. I was always serious just by being loyal and sticking to my own personal relationship morals. I feel as though Im lacking the basic needs to be in a relationship. Some things would include afraid to speak my emotions (I was always yelled at by previous boyfriends when I would address an obvious problem) being confident with myself 100% and trust issues. Im aware that those are somewhat crutial to being in a happy relationship, and Im trying to do better in general. 

My back story is that I was always dumped because I wasnt good enough. I would be replaced without warning with a girl who obviously looked better and was much more "interesting." Usually I was replaced within a week or two. I always thought there was something wrong with me and it would eat away at my conscious. Over the years of bad relationships, I have developed a low amount of confidence about relationships in general. Ive been lied to about being loved and my love for love (or at least the idea of it) has been demolished. I have given up on the idea of love because I have had my heart stomped on enough. I wish I could regain the amount of love I used to carry in me, but it just seems pointless to even love in our generation. 

The point that I would like to get across is that I need some pointers on what I need to know about keeping a relationship going.
<bot>: Girl with broken past needs relationship advice that actually works. Need pointers on what to avoid doing and what would be best in general.