Heavy set 38 year old sexless married women

Hello we ahve been married for three years and we have no communication or sex when we met we talked for hours getting reaqanted since his cousin is my bestfriend and five years older than me well when we first spoke agin in along time we hit it off he lived in another state but we both talked what we wanted and at a short tiem we stared dating seeing eachother every weekend and having a healthy sexual realtionship well once we got married it started the night over our honey money no sex and not for three monthe then after asking him and getting angry he finally gave in yes gave in because it seemed like I had to beg him to talk and to make love. Well after that I got pregnant and had our baby well to cut things short it's been three years and we still don't have sex his excuses have been I'm tired, this is new to me, I don't feel good, something is wrong with me(so you go to the doctor and nothings wrong) I'm under pressure at work. So I've asked him if he is gay or is it because I gained weight or does my stomach bother him and so on but at this point I've had it that I really don't want the marriage because the samll things that don't matter are starting to get big because I feel that I am being used and I can' seem to get a conversation from him. What advise can I get. Thanks

Are there any reasons for you to stay in this marriage?