Time to move on?

Hello, first I want to introduce myself (however, due to the sensitivity of this topic, I'll be leaving out names, and posting anonymously) anyways, I'm a 25 year old wife of 8 years to a man 13 years my senior and we have two beautiful boys. When we got married, I never expected 8 years later I would be with a man like him, he's not very into our marriage and is very selfish and controlling.. on with the story, he knew when we got together that I wanted at least 3 children, and was completely OK with that. The first two years of TTC were rough... I was told I'd never have children... but we kept trying and were blessed with our first son... 2 years later we were blessed again with our "surprise" baby, another boy... now my children are 4 and 6... and I'm more than ready for baby 3... however, now my husband has said no more... it had been 2 years in Sept since he last touched me... no matter what I do or try, I'm rejected... he has no intentions of even being remotely intimate, the last time he said he loved me was 3 months ago after a fight... we don't even sleep the same way in bed... he sleeps with his head at the foot of the bed and back towards me, and I sleep with my head at the head of the bed... its been this way for months... he shows no affection... and I've begun to get bitter... even though I craved it after it stopped, now that its been so long, I don't even want it... I flinch whenever anyone touches me, a pat on the back from my boss, a hug from my family, the thought that runs through my head is usually "OK, why are you touching me, please stop" I've tried to reach out to therapists, but he won't go... I've even tried to leave, but he stops me by saying "I love you, please stay, you're my life, I'd be lost without you" I'm lost, alone, and bitter... I feel like this is all life has to offer, so I settle... any advice ladies?