<human>: Give me a shortened version of the text

We've been dating for a year and a half. She means a lot to me and has quickly become my best friend. I am in a rigorous grad school program and she's stuck by me. We live together and our lease isn't up until August. She moved to another state for me so I feel extremely guilty for  feeling like I want to break up with her. She's a fantastic girlfriend, aside from being too needy and a bit suffocating on occasions. Further, she seems to always be depressed and it's been weighing me down. I've tried to help her, but it's to the point where she's stressing me out to the point that it may be affecting my schoolwork.  

My biggest dilemma is I don't feel physically attracted to her any longer. We had sex for the first time in 2 months and I felt kind of obligated to do it. I don't know what I can do and I feel so incredibly guilty for not being attracted to her any more. I've been beating myself up over it and I just don't know what to do. She hasn't gained weight or changed her appearance drastically so I feel like such a dick for not being attracted to her any more.  

Are these reasons a valid reason to break up with her? I feel like I'm just going through the motions with our relationship right now : (
<bot>: I love my girlfriend but am not attracted to her anymore and it's putting a huge stress on me and the relationship. Is this a valid reason to break up?