marriage counseling.

we’re not married, just engaged. can we still go to “marriage counseling?” also, how should i bring this up to my so? there’s no cheating or any serious serious issues, we’ve just lost our communication and can’t work our our problems on our own. would really like to see someone and see if that helps. any advice? we’re both still young (21) been together for 2 years and have a 6 month old and another on the way. he’s very jealous for no reason (he thinks everyone looks at me and or i look at others when we’re out), ive been very lazy since having a baby (he’s 6 months old) and being pregnant is so hard on my body. i don’t give him sex like he wants, maybe once or twice a month. ive become depressed since having my son and he doesn’t understand it. he smokes and i can’t and it comes in between our relationship. it sucks bc it feels like that’s all we ever did but now that i was pregnant and am pregnant again i can’t smoke so we dont have that in common anymore. we don’t really go out. i seem like i’m loosing him slowly 😕