Feeling Guilty! Serious Answers.?

Ok I'm 20 years old. I met a guy my freshman year of college and we've been dating since then. I feel like I'm being used sometimes. He moved with me my 2nd year and we've been staying together everysince. He pay no bills and he don't work. This past semester he was told he couldn't come back to school. Lat mothers day I met a guy and he was really nice, we were friends for a while and we suddenly ended our frienship. This christmas we hung out again and just recently when I went home I spent the nigh with mhim at a hotel. We didn't have any ual interrcourse. All of a sudden I have started to feel guilty. I have told my boyfriend about it and he told me about some of his friends and about a girl that he let dance on him at a friend house. However what I did, i feel was extreme! This is my 2nd time feeling like this. I have ben to the hospital because of a panic attack/anxiety attack. The doctors told me that I have acid reflux so maybe that's the cause of some of the shortness of breath I've been having. I had a therapy appointment yesterday. I just hate feeling guility and like I've hurt someone. I feel like I'm dieing. I have cancelled my spring break trip because I feel so bad! Can someone help me! (excuse the typos) just nervous and scared! Be blessed! Thanks