Own Camper. Boyfriend spends some of the days/nights. All my supplies, etc. I pay all related expenses, storage, camp site, insurance, repairs, etc. Confused about expense boyfriend should share. Honeymoon is over. Burnt out on providing everything?

There is no "honeymoon" with a boyfriend. You already are done with him so move on!

Did you buy the camper because you both wanted to camp, or did you already own it? If you already owned it he should pay half of any trip the two of you take in it. That is the campsite, supplies used, and any minor maintenance or repairs. That leaves storage and insurance as your sole responsibility. If you bought it as a joint venture he needs to pony up on those as well.

There needs to be a conversation in regards to expenses. I do find it telling that he hasn't offered a dime to help defray any costs. It speaks to his character. A real friend - boyfriend or not - wouldn't blithely go along with someone paying for everything and not offer to offset some of the costs.