Sexual relationship with my husband.

I'm Vidya (32 yrs) and my husband (35 yrs), we are married for last 2 years now. I didn't have a proper sexual relationship with my husband and we have hardly had sex 4-5 times in the last 2 years. The reason (my assumptions) being he was a chain smoker and use to consume alcohol (high) every alternative days. For the last 1 year, he had stopped smoking and now he is started again and the consumption of alcohol has come down to weekly once or twice. Also, he has put on weight (87kg) and body is not flexible and doesn't follow proper diet. We do not have sex at all and when we have we end giving it up as his penis erectness goes off and also since his body is not flexible he feels it's a tough work.