DH and I have been together for 15 years, married for 5 and have 1 DC. Things are great, We're really happy and he's my best friend and husband all rolled into one.
Recently I started a new job and crossed paths with an old flame. DH and I split for a short time around 12 years ago and me and this other guy, who I was friends with at the time, became very close and slept together a few times before DH and I decided to give things another go, we went separate ways and haven't seen or heard from each other since until a couple of weeks ago. At the time I was sad that we had ruined the friendship that we once had but it was for the best as there was still something there for both of us.
Last week we had a catch-up over lunch, it was lovely to have a chat and catch up on the last decade but he was very flirty and suggestive, I asked him to stop and he apologised and agreed we'd keep things professional.
We don't cross paths very often at my new job, we both work in different departments, but I cannot stop thinking about him and the what ifs and I feel terrible about it. I would and could never act on it, I love my husband, and I don't want to be thinking about him but I can't stop. Is this normal? I feel like it's just brought old feelings back and that's why I'm feeling this way. Is there anything I can do to stop it other than avoiding him as much as I can and hoping it will pass?