You can't let this go because it isn't the first time it's happened - you're looking for an answer to a bigger question. I think you know there isn't a future in it or any point to guessing his reasoning other than sussing out why you were attracted to someone like this again. You're worried what this means about you and what the consequences will be for your future. Stay with your current therapist and keep working on it. If you were genuinely concerned about losing someone you love i feel the end questions in particular would be of a more practical nature. Focus on you and what YOU want out of a relationship, if someone is worth your time you will know it.