Desperate need help please?

I went on A site for anxiety and depression they connect you with a listener that is supposed to help you feel better. I connected with a listener who was a guy we talked about all my problems in life including my problems with my boyfriend and stuff, he wanted to continue talking but had to work so I gave him my email and phone number but we never talked on phone only through emailing he was really nice saying I was beautiful and best of luck to me and my boyfriend I never once complimented him on his looks or anything just said he was a nice guy I thanked him for all the help and told him I'd be there if he needed help also he didn't have to go through it alone but then he asked me to runaway and I said I know we are helpful to each other but I can't just runaway with you I'm faithful to my boyfriend I then blocked him but anxiety flared up and I unblocked him and asked if I had come across flirtatious to him or something for him to say that and he said not once did I sound flirtacious nor of line and I did nothing wrong and he was only kidding he wasn't being serious , do I have reason to worry or have anxiety over this or am I just being really silly I never once said I liked this guy or wanted to be with him am I overthinking this? I have OCD and I struggle with overthinking things to the point where I feel like I've cheated so please help me with this. Much appreciated thank you I can't take anymore