My new date wants to go on a trip with me, but I have self-confidence issues

There's this very well-mannered, polite, handsome Arabian guy I met a few days ago. We had 2 dates and he says he enjoy my company and I also enjoy his company. We went out for coffee and for walks in the nature and that was it. We talked about each other's life and we also kissed, but nothing more.

Now he wants to take me to a trip for 3-4 days (he wanted seven days actually, but I said I have to be back by the end of the week). It'd be a city that is a few hours from here, but it's really beautiful, I told him I wanted to visit that city for a long time. He said sure, we could do it right now, he's going to pay for the hotel room and all the expenses and let's have a great time together.

Problem is: I don't want to con a man to pay a lot of expenses and wake up to an unpleasant surprise. I don't know what he saw at me, because he told me my body is great and it's not true. LIKE REALLY, I am not shy or anything, but I know it isn't. I'm 5'1 tall and 152 pounds. Also I'm not very muscular, I'm more "puffy" type and this guy goes to the gym rigorously and has a truly awesome body.

I didn't even know what to say when he told me that my body is flawless, because it's so far from the truth, but I guess the only explanation is that I look good in clothes....Anyway, I don't know what to do. I'm so excited to go with him and of course I'd be also willing to get intimate with him, because I really like him and he's been very nice to me, but I'm just afraid that I'm not going to deliver what he wants.

What should I do in this situation ? 22/F