Is it Worth it?

I married my husband 8 years ago! I was 18 and he was 28! I love him beyond words but I just cant seem to make the man happy! He is always stressed out and all he wants to do is play video games and then anything with firearms. He seems so distant but when i mention it to him he does just says "everything is fine" stop worrying but I am at a point where I feel like I am not happy. I am just so lost and I want to find out what is going on with him. I know that I have gained a lot of weight and a lot of the time I just were a t-shirt and jeans, but i have no self confidence, that was gone a long time ago.  I just feel so alone. I guess I am just venting but I dont know what to do anymore.