Six months ago, my boyfriend confessed that he had cheated on me. It's taken me a long time, but I've forgiven him. I want a future with him, but these trust issues we have are killing the relationship.
Infidelity causes serious and yet subtle stress on a relationship long after the fact.
That may mean you're subconsciously holding his past against him. And even if you have totally let bygones be bygones, your beau may not yet be able to forgive himself. Perhaps because deep down he wishes you would cheat, which would even the score and alleviate the guilt he still feels about what he's done. As you well know, healthy relationships can't survive when partners keep each other under surveillance, which makes it imperative that you clear the air with a discussion. For starters, ask him why he suspects you're fooling around.