dealing with a spouse who is depressed

Hello. My husband & I are going through a very difficult time right now & I am in need of some guidance & just someone to talk to basically ! To sum up a long story we are both out of a job, due to unexpected recent job loss, living with my mother ,& expecting our first child in march. I believe my husband is depressed but he refuses to talk about it with me or seek help. He is irritable, moody, gets angry easily & for little or no reason. He doesnt want to have sex anymore, he wants alot of alone time & always complains that he feels on edge & stressed all the time. He looks for ways to cope with the stress like taking a long drive by himself, taking a nice long bath to relax or just simply getting out of the house to exercise or do something active. All of these things seem to help for a short & brief time but the stress always returns. It is affecting our relationship very much & I am trying to be strong & save my marriage but it is taking a toll on me as well. He has always been very happy, free spirited & just easy going. This stress has turned him into a person that I dont feel like I know anymore & that is very hard to deal with for me. Especially with a baby on the way, I need him more than any other time right now & its just not possible in the state he is in ! I feel all alone & very sad because im afraid it wont get better & he will always be this way. I know thats not the reality but very easy to feel that way right now ! He likes to spend time away from the house as much as possible, im sure he feels worthless & all since we are living here with her. He looks for ways to cope with the stress by hanging with friends & doing activities he once enjoyed but all of this is hard for me because i really want to spend time with him. Even though I know if he was here he would just be sitting playing video games or not talking anyways. He tells me everything will get better eventually but if he wont get help for it im afraid it wont, or it will just be a temporary fix & will come back again ! He has recently gotten a good job where we should be able to move out of my moms soon & start working towards happiness again, but he still says he feels stressed & that nothing is any better. Thats what makes me feel this is depression. I just dont want it to ruin my marriage, i know that i am not going to leave him & that i am here for the long haul to help him out anyway i can. I just worry that the depression will take over his mind & body & make him want to leave me thinking it will make things better ! Please help me. I need some words of advice or encouragment from someone who has been here before ! If he wont seek help what else can be done ? Thanks = )