I'm excited for your upcoming trip! It should be a well-deserved opportunity for both of you to reconnect and checkin. In terms of sex, I agree with Hope that you will know if its right. Know that sex can be a very bonding event for a man and that it may very well work to help with that reconnection. You'll want to just be honest about it with him, and keep your expectations low regarding any positives from it. If it happens, maybe try to merely enjoy it! It is not a stranger that you are considering ML to. It is your H (X yes, but still your H).
Let us know how things are going with you! I always enjoy hearing from you.