I want to break up with him
What reasons led you to wanting to break up?
He is neglecting major issues in our relationship.
Relationships take work to maintain and it's not appropriate for a partner to not put in any effort in improving the relationship that he or she is in. If your partner is neglecting major issues in the relationship and you've talked to him before about those issues, then it is appropriate for you to break up since the relationship is not going to get any better. We can't control what other people do in a relationship but we can control our actions and leave when a relationship is unsatisfying.
We've been together for so long but I can't wait to get him out of my life.
I'm proud of you for standing up for yourself. I wish you luck on your future relationship.