only you can decide if it's too soon or not. There's no right or wrong answer there
If you decide to go, talk to you H about how you're feeling. Let him know that while you want to go, it by no means that all is forgiven or okay, and there's still a long road of healing ahead, but you will accept the time away with him. Discuss the fact that your emotions might change in the blink of an eye.. he can take this opportunity to reassure you and show that he is continuing to put you first. Talk about what his expectations are during the trip, and what the two of you will do if things take a turn.
It sounds like he's trying