My Husband Doesn't Show Any Affection.

He hasn't shown any affection since 2 years after we got married. First it was because he worked too much and now its just gotten worse since he got hurt and has been through 30 surgeries that i have cared for him through. He doesn't seem to care at all about my feelings! I want to leave him but he puts me on a guilt trip every time i want to leave. I'm tired of feeling alone and i have been going through this for over 16 years. Just a hug or a kiss everyday would be nice. He is very negative and even my kids that r grown think i should leave him, but he cries and says he has no one but he does have his family even though they have never helped any of the times he has been in hospital it all falls on me. I want to live my life and be happy. He totally stresses me every single day. I would stay his friend, but i want a husband who will really love me and show affection. Don't know what to do anymore! So unhappy about this relationship.