<human>: Give me the gist of the text in a nutshell

My [18/m] boyfriend and I [18/f] have been seeing each other for over 2 years and I'm pretty sure tomorrow is the end. I sent him an email (because our schedules are different and we rarely see/talk to each other anymore) explaining that I felt like we were drifting apart. He hasn't responded, and whenever we talked he said that he needed more time to think about it. Which I completely understood. He contacted me earlier today saying that he wanted to hang out tomorrow. The way that we've been talking I can tell that tomorrow is going to be bad, and I'm pretty sure we're going to break up. I don't want to at all, I love him and I can't see myself with anyone else, but his happiness means more to me than anything else right now. If he wants to end things, I know that's what I'll have to do. I just need help in being strong when it happens. How do I sit there and listen to the man I love tell me that we shouldn't be together anymore? How do I not break down crying in front of him?
<bot>: I'm pretty sure tomorrow my boyfriend of 2+ years is going to break up with me. How do I sit there and take it without breaking down in tears?