I'm not going to make my boyfriend come over to my house
Why don't you want your boyfriend to come over?
He doesn't want to come over because I told him that he has bad breath.
You shouldn't force your bf to do things they don't want to do. But if he wants to come over, you should let him.
He said he didn't want to come over anyway.
No one likes to be told they have bad breathe and if they listen to you, then it shouldn't be a problem. The manner in which you tell can be touchy and it require subtlety. Let them come over when they get over it.