My partner has always been quite secretive. We've been seeing each other for 8 months and I've always had the sense that he isn't being straight with me. I did have it out with him a few months ago but he got angry and told me he would never lie and he was really hurt by the suggestion. However I've never met any family, only met a few friends and he tells stories about his past that sound very far fetched. So I still don't really believe or fully trust him. But.... he is a lovely, kind, caring man. He's been brilliant with my kids and I love being with him for all the good bits of our relationship.
However, I've recently found out that he went out to a black tie dinner without me when he had told me he was doing something completely different (in quite a lot of detail).
When I found out (by digging around social media and finding some photos of him at the black tie event) I confronted him and asked him to tell me the truth. When he realised I knew where he'd been, he admitted it. He got very upset, told me it was to do with his business (and to secure our financial future), and told me he'd been wrong not to trust me with the truth.
I've forgiven him but a few weeks later I've got this nagging doubt that he never actually told me everything about that evening, only what he thought I knew, and if he was capable of lying once, how can I be sure it won't happen again.
Would you have forgiven him and how can I truly put my mind at rest?