No intimacy…

So my partner basically openly admitted that the reason he’s not that affectionate with me is because of his past long term relationship. Apparently it “scarred” him and he still finds it hard to be affectionate. This past relationship was 13 years ago! We’ve been together for 7 years now Personally I feel like it’s an excuse to not make an effort or show his vulnerable side to me. It’s really bugging me now and I have no idea how to bring it up 😖