Me and my girlfriend have been together for almost three years. This past year/year and a half, the relationships been rough and bumpy. Sometimes I think I do not have time for a girlfriend, and that we should maybe call it quits. I think she is too attached though. I love her but yesterday she really made me mad. I told her that I would be taking my sister to school and couldn't hang out. She, after I told her what I was going to be doing, ended up texting my sister, asking her if she did indeed go to school today. I took my sister to the library at her school so she said "no she didn't have class today". Then I recieve a call from my girlfriend, telling me that I lied. And that she found out by texting my sister. I told her what I did and she said she was sorry. But, to me, thats a very big leap. She just accused me of lying, I don't know what to do.
So here is my question, I felt a little betrayed/weird that she had to go behind my back to figure out what was going on. I don't expect those types of things out of her. I was very mad about this and have been thinking about calling it quits. It seems like she doesn't trust me. I believe that she doesn't trust me. I was a little hurt but now I'm really pissed. I don't know what to do. Please help me!!!
Thanks!!!