I think I'm going to break up with my boyfriend while he's away for work for 7 weeks
Is it because he is going away for work? Why would you want to break up with him?
Yes. I'm going to feels lonely and miserable when he is not around.
It would be better if you could break up with him in person, but you shouldn't stay in a relationship you don't want to be in just because your partner isn't in the area. You have to take care of yourself and your needs.
I know, I'm sad I have to do this to him, but I just can't hold it in anymore.
Don't worry, it always hurts in the beginning, but in due time you will be back to your normal self and be happy again. You are doing the right thing, and I will do what I can to keep you company. That way, you won't feel like you have to deal with this by yourself.