US girl met Brit boy in America but nothing happened. I was in relationship at the time. We email every coupl?

weeks and now text 1x per week. I flirt a little in emails, he doesn't but signs texts with an x. Is he into me? First Brit to be interested in. Help me figure this out. Haven't embarred myself..yet. Help UK guys. This has been going on for several months. We're in our 40's but I feel like a teenager and out of my element.