Break it up with your seven year relationship, keeping him is cruel. You’re both not happy anymore. Communicate. Don’t make plan A and plan B with relationship. I have a similar experience with my ex-gf. We’re both not happy anymore. She also found a guy she’s more compatible with while we’re still in the relationship. I’m not blaming my ex-gf. I’ve been a toxic partner.
Just let it go now. Go on with your separate lives. Treasure your Good Memories together and the Lessons that you’ve learn. Don’t be sad it end, instead be happy it happen.