Sounds familiar. I was basically pushed into marriage at 18 (no, I wasn't pregnant) and I didn't "love" him. We'd been going together for 3 years and my parents said his family was "too good a family" for me to not marry him so they said I had to marry him. I was so naive -- well, it doesn't really matter now. I stayed in that marriage for 26 years, even tho he was emotionally abusive.
There wasn't any spark, and never was. I also had 2 kids.
I waited til the youngest turned 18 and then filed for divorce.
He stalked me for a very long time - called me in the middle of the night all the time. It went on so long I had to move out of town - he didn't know where I lived. He was really upset.
I wish I knew what to tell you. But I couldn't live the lie any longer. Besides, he was being abusive. I'd been in a mental hospital once. So I'd had enough.
I wish you the very best. You have to decide if living a lie is better than "ruining" two lives. God bless and please take care. Hugs, Lee