I just found some sh*t out...

So basically me n my partner have been together a whole year now. We met online last July and these times I was 3monrhs pregnant from a previous relationship. I was only looking for a friend to talk to as I moved back to my moms in London. He came across me on the internet n we just clicked instantly. He was great just talking to. We didn't meet up until a week later and we instantly clicked and got on like two peas in a pod. He was excited about my pregnancy and he wanted to support me the whole way. But that night we we're eating out and I started to spot bleed in the restaurant. We called a cab to his moms and by that time I was bleeding heavily. Cut a long story short... I lost my precious baby. He cried with me in hospital n shared the pain with me n took some weight of my shoulders. Ever since that day, I can't be without him. We moved into my moms and lived there for 3 months and then we got our own flat. We've basically been living together since the day we met. Crazy, right? But it's been perfect and he's been the man lifting me up since my miscarriage. He even calls my lost baby, "our" baby. It makes me crumble. Anyway he split from his ex a year before we met. November 2014. Anyway I met his kids briefly when we bumped into them n his ex when we were in mc D's one time. I met his kids properly for the first time a month ago. We had a lovely time.. We picked them up took them shopping n out to eat and then cinema together. My partner introduced me to them properly as his partner in life and girlfriend. They loved me, even we're holding my hands and playing with my hair (they're both girls age 6 n 8). They 6yr old is his step daughter from when his ex cheated on him.. His step child is sisters with his biological daughter. Fair enough he's been there since she was born.. So I can't knock him for still being there as she is the sister of his daughter too. But anyway we was out at pizza hut when his step daughter briefly said something "when u married mommy... " my heart paused n I asked him about it when we got home n he swore on our baby's life that he's not married. Anyway time passed and I decided to look for his ex on Facebook. I finally found her n there was a picture uploaded in 2012 on her facebook of them kissing on their wedding day.. He was at work n I confronted him when he got home. He blamed the reason on not telling me he was married was that he was scared I wouldn't want to be with him n when he had met me he didn't want to ruin anything where my emotions we're so vulnerable about my miscarriage too. He said he didn't want to ruin what we had. Because his mom n sister had told him that if he tells me he's married, I would leave him. So he said that he got that buried in his head. And he said where I got violent with him before n hit him because I was so depressed last year. He said he was scared I would flip out like that again.. He said we will start the divorce next months payday and get it all started. He said the reason why he didn't file for one yet is cause he hasn't had the money as he did lose his job n that.. It's really hard for me knowing that I'm with a married man. Even though they are enot together n she knows I'm with him n has met her kids.. I just want him to hurry up n pay for the proceedings to start..

Ladies.. Please some ADVICE!! xxx