Being Appreciative For A Friend Helping You.

I just had a good friend help me w/ a major project that I am so happy he helped me with.
I had gotten a new head/foot board and the frame for my bed and was in need of help tearing the old one apart and getting it out of the room and puting the new one together in the room I asked him if he would help me do this and he said "sure".
I never thought it would be as much work as it was takeing everything out of the room just to get the new one set up. I then said to him I want to rearrange my room and make it different looking he helped me move all the furniture around. We took a break and then he helped me vac and get the apartment back in order. I was so appreciative I told him I would do something nice for him in return but he said "don't worry about it". I'd feel bad if I didn't for he did a huge favor for me by helping me do all that moveing and getting things back in order. Have you had a friend help you out and you wanted to return the favor? Did the person helping you out accept or decline the favor in return? I will do something for my friend for it's the right thing to do he just don't know it yet.