We've been together 13months, just started living together and I saw his ex out in town and one of her friends started shouting at me, which I thought was quite random. So I messaged his ex to ask what the problem was and she told me EVERYTHING.
Within 6 weeks of our relationship starting he had text her to arrange meeting up and gone over to hers and had sex with her. Then I assume all contact stopped.
Then again this April we had a 2 week break due to some petty argument and we agreed space would do U's good. During which time I slept with someone else and admitted to it the next day and begged for forgiveness but never expected we could sort things out after that, but to my surprise he did.
Turns out he had his ex over in our bed and she had stayed over, with her daughter! Also another arranged hook up.

But I found all this out, after he asked me to move in with me (and I agreed) after he took me on holiday for our anniversary, bought me a promise ring and became a big part of my families life.

When I confronted him he denied both occasions, then eventually 1, then finally admitted to both! He admitted he never would have told me.his explanation! That the first time he did it was because of his attachment to her daughter (he had bought her up for a little while) which I think is a disgusting excuse to be honest. And the second time was because of my indiscretion and he was angry about it, although it apparently meant nothing and that's when he realised how much he loved me and was terrified I wouldn't forgive him. He doesn't seem upset and managed to lie, deceive and betray me within 6 weeks of our relationship starting until April of this year!

Please someone give me some impartial advice because right now I'm too angry/upset to think clearly.

Hi I'm a girl and have had similar problems.I will ask you a question and you NEED to Digg deep and answer honestly okk... with everything that has happen ,do you really see yourself marrying him HONESTLY? I bet you know deep down that this is a bad poisonese relationship just like one I had. Its hard... it will be hard but sweetheart open your eyes , this guys is like this and nothing will make you forget everything he has done. It sucks that he gets along with your family but your family will NOT marry him and I'm sure they know guys come and go don't let that tie you down. Its hard cause your accustomed but you can find better believe me you want a beautiful relashionship and this is not one. All relashioships have problems but these you have... goshh... I don't know how you do it. Take sometime for yourself find yourself learn to respect yourself and you will see and later you will look back on this and say WOW I was crazy! YOU WILL LEARN FROM THIS. I hope I have helped in one way or another