How far apart in age is to far?!

Tiffani
My son just turned 5 in November and we have been trying to get pg with baby #2 for 3 years now unsuccessfully :( it took 1 year with our son. I fear we are getting to far apart in age if we got pg now he'd be 6 by the time his baby brother or sister was born. My hubby is very discouraged and keeps bringing this up but doesn't quite want to give up yet. My sister and I are 8 years apart but we are closer than ever! We aren't getting any younger either we are both 31. What do y'all think?!!