S.L.
It sounds like he is just enjoying that time with you right now. I nursed 2 boys ... one for 23 months (he weaned himself in the first trimester of pregnancy with my second) and my second I nursed for almost 2 1/2 years (this one I had to wean, but it was easy.) I see nothing wrong with letting him have that comfort as long as you are ok with it. Once you quit nursing, you can't go back, so enjoy this bonding time with him!