Feel liie its all falling apart

So me and my husband are 32 we have been together for 18 years thats a very long time for our age we have 3 disabled children the past few years have been tough and it has ripped our marriage appart we are hanging on by a thred we are both suffering from depression stress anxiety you name it husband is struggling with erectile dysfunction and we have not had sex in 6 months never ever have we gone 6 months we spoke about it and he says he feel like he needs alcohol for some dutch currage to have sex with me so yes i lie evary night and cry myself to sleep knowing that my husband needs to be drunk to have sex with me he says its nothing to do with me but i think it is i don't think that he actually loves me anymore i am completely broken my kids are running me into the ground the only person that has ever kept me going is him we used to have fun together have date nights even if they were just at home with a takeaway i just don't know what to do anymore do i give up?