How can i get my self to just like my relationship and not worry about it?

well sounds like all you can do is talk to her and learn to create that trust. I also had relationship problems from past screw overs. Sounds like you have a really nice girl and if your relationship lasts, it will last for a long time seeing as she's never been emotionally attached to anyone else before. So you need to decide if you're ready for a commitment and if you are talk through each of your fears with each other. Opening up and making yourself vulnerable to each other will one, be a big turn on for her and two, start creating a trust and a reliability to each other. My best friend has done this with her current boyfriend ever since they started dating and they are getting married later this year. Hope i helped =]