American girl met single Brit boy in the states. At the time married but since seperated but he doesn't know.?

Nothing "happened" in US but seemed like mutual attraction. We email every couple weeks and now he texts me a few times so contact 1 per week now. He has not indicated any interest but texts have x after name and he does spend time telling me about himself. I do as well and tried to indicate my interest by saying "thought about you today" etc. Is he into me? I never have been interested in a Brit before and need some Brit help. We're 40. How do Brit guys show interest....British please add your insight!! By the way his job keeps him very busy yet he finds the time to keep contact. Too embarred to tell about recent split unless he is interested too.