<human>: Give me the gist of the text in a nutshell

She was with him for the majority of high school, and about half of her first year of college. We got together a couple months after they broke up. Now, I've never been with anyone who's had an ex they've been with for so long, and its causing some odd internal conflicts for me. 

First off, I feel as if I have to live up to what they had since they were together for so long. I get a bit insecure and wonder if she'll love me as much as she loved him. I know its stupid, but I can't help but feel that way.

Secondly, I get a little insecure when we do things that I know they did together. I recently moved to her area for college, and she's lived here her whole life so she usually comes up with places to go, and it just feels a bit odd to me sometimes when we do those things. For example, when we would have a picnic, and use a blanket that they used to use, or I do something for her that he used to do for her. 

I guess I'm not sure how to deal with her having such a serious relationship before me, since I've never had to before. It sort of feels like she's given so much of herself to him that I'm not sure if she would be able to do the same for me. She says she's completely over him but of course there will be things that remind her of him and maybe its those things that remind her that make me feel insecure. How do I get myself to stop feeling this way?
<bot>: The fact that she had such a serious relationship before me makes me feel insecure because I'm not sure if she will love me as much as she loved him