I do really miss him
Then this is somewhat complex. If you do miss him, try to think about both the good times you spent together, and the reason you broke up. Could things have been different? Do you believe you can work on the relationship to fix the issues? If both answers were yes, then tell him. If not, you'll just start a path where you'll both end up apart and sad again. Best of luck!
I’m at a lost because he broke up so he could be happy...
I don’t know about that
We get along fine he just wanted to be happy...
Then do it
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