How to rekindle our marriage?

My separate husband and I are going on a vacation for a week together. I would want to rekindle our relationship and see if we can work things out. Any advice of how to do so? This trip is only going to be me and him so what can I do? I really do love him but he doesn’t believe that (not good at showing love to anyone). Also, I don’t want to look like a fool and have him think wrong - This is my husband and we both still love each other very much so I don’t see any wrong in trying to rekindle our relationship but I don’t know if this is a man thing but at least my husband personally is a person that wants to go with the flow and when I say rekindle our love or lets work things out /put effort.. he kinda says things like I don’t know what is going to happen in the future or just a simply I don’t know. How can a couple be together again with no efforts? I just want our relationship to be better and get back together. Please let me hear your opinion on how I should go about this.