Coach offered me a fight, but I’m having second thoughts, what do I do?

Some background: I have been training muay thai for about a year and a half now. I’ve told training partners that I’d ideally like to fight one day, but I’m not sure if I ever will. I am also taking prerequisite classes at my local college so I can apply for physical therapy doctorate programs for my career.

When my coach asked if I wanted to fight, I said I’d like to. He laid out what the training/camp would look like, and now I’m not sure I can commit to that long term. I think that it would be best for me to continue focusing on my career, and I want to prioritize that first.

How do I tell him? It has only been a couple days since I said yes, and the fight isn’t until June. I’m worried about disappointing him/disrespecting all of the training he has given me, but I really think this is what is best for me.