I feel terrible.

So me and my boyfriend have been dating for 4 years and 2 years ago we broke up for about 4 months & I had sex with this other guy ( with no intention of getting back with my boyfriend) and the sex was terrible 5 minutes and I cried so he stopped. My boyfriend got back together and we had a conversation and he asked if I had sex with anybody when we were broken up and I said no simply because I wanted it just to disappear I wanted to imagine it didn't happen well a few years later he asked the same question and I came out clean I feel terrible and now he dumped me is there any hope for us ?