<human>: Can you summarize the given text in a few sentences?

I feel like neither of us are getting what we want out of this relationship, yet she doesn't want me to leave. I rarely see her Nowadays (once a week, if that). She wants sex more than I'm comfortable giving right now, as sex is much more important to her than it is to me. 

She asked me on Wednesday if I'd be okay making our relationship open, and that didn't sit well with me at all. I asked her if she wanted to see other people, she said yes, and I responded with "okay, that's fine if you want to, but I can't date you if you're seeing other people". She took that as me being "selfish" for not "making a sacrifice" to make her happy, and that I was "punishing" her by making her choose between dating me and seeing other people for sex. It feels to my like she wants to have cake and eat it too.

Since then, she's been texting me things like "I'll make you love me" and it's not sitting well with me at all. I've tried to break things of on a few occasions but she always guilt trips me into staying with her (with things like "after all I've done for you" stuff).

We both love eachother, but I just don't see a way we can be happy together. We both need things from each other that we can't give. I've described my situation to friends and they agreed with me that it would probably be best if we broke up, but I just don't know how to do it tactfully. I'm going over tomorrow to her house to end it, does anyone have any advice on how I can let her down as gently as possible? It's not like we've fallen out of love, I just feel like based on circumstantial reasons we shouldn't be dating anymore.
<bot>: Me and my girlfriend love each other, but I don't see a way we can be happy together, and I want to end things. How can I do that as gently as possible?