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

I tried to break up with him before I left for a summer job opportunity away from home because I thought I wanted to see other people, but he sweet talked me into staying together if we could have an open relationship. I was so scared of hurting him then that I just agreed to it, but I realize my mistake. I don't even care about seeing other people though, I just know this relationship needs to end. However, we have about six weeks before we can see each other again.

I feel like such an arsehole when he sends me the "You're everything I need," type texts and I respond "You are too," when I really am ready to move on. It's gotten to the point where I actually get angry that he's interrupting me driving or watching TV by calling me.

Despite the way I'm sounding, this relationship has had a great run and we have put in a lot of effort to make it as strong and wonderful as possible. This probably deserves better than a breakup text/call, but meanwhile, am I just supposed to keep up appearances? Can it wait, or can this be nipped in the bud?
<bot>: Want to break up with my temporarily LDR BF, but there're only a few weks til we can see each other again. What do?