Worried bout my fiance,its hurtin me.?

Well the whole reason y i am worried bout my fiance... bc about a wk he has been feelin depressd bout sumthin but he wont tell me or his mom. he is the type where he keeps it among himself, which i tell him it is not good to keep it nsyde, it is good if he would *** out tell me or his mom what is eatn him up nsyde so we can try our best to help him.He is 18 and i am 20, he is bout to start LPN skool nxt month and i am goin back to college in aug. i truly think he is depressd bc he is not gn 2 b wrkn as much as he duz now + havin to buckl dwn in LPN skl (its a 11month course). anotha thng is that a few ppl @ wrk has tld he lkz like he has gain a lil weight, so he is bak on a diet.what du i and his mom need to du to blurt out wut is wrong w/ him, we need help bc it is hurtin me so much. if any plz cld hlp me out here.