<human>: Can you succinctly summarize the text in 1-3 sentences?

This is my first real girlfriend and so far it is simply amazing. We got really comfortable around each other really fast and even told each other that we loved each other shortly after 1 month and I do. And I believe she does as well.

Yesterday we were hanging out at my house for the 11 millionth time it seems (not complaining). We were watching Game of Thrones and she told me that when the episode ended she wanted to have sex. (We have sex relatively often) So the episode ended and she seemed really tired so I just laid next to her and kind of started touching her in places waiting for an ok. Instead she started crying.

Now, its not that unusual for her to start crying like that. There's been a number of times when I let her lay down with me and cry, usually about stress or difficulties with her friends. I asked what was wrong and she wouldn't tell me and wouldn't tell me. Finally I got it out of her. She said she doesn't know why but that she feels like crying when she's around me maybe a third of the time. She said she didn't want to tell me because she was afraid I'd leave her and I said of course I wouldn't. Then I said I don't YOU to leave ME. She said absolutely not.

I honestly don't know why she feels this way and I can't help thinking that its my fault. She was in a relationship before me that from what I've heard was pretty rough. Always being forced into sex, him getting addicted to alcohol and trying sketchy drugs, and switching between her and another girl for almost a year. Maybe it has something to do with that? What could it be?
<bot>: I don't have any idea why my girlfriend feels like she needs to cry whenever she's around me even though I love her and she loves me.