Totally broken

So the week before I found out I was pregnant my partner and I argued he told me he was in love with another woman a woman I just presumed was a friend I went mad and was broken well he deleted all contact with her fb the lot and he really tried to make things up with me I’m 10 weeks pregnant now and just found out he’s back in i tact with this woman but claiming he is no longer in love with this woman well I’m totally broken and in bits and now lost the trust he has just gained back. Ladies I don’t know what to do because I love this man more than anything do I walk away and start my life all over with my baby on my own or do I trust that he no longer loves this woman and stay with him no nasty comments please I just need some advice and support I have no family