He lie for 4 years

I have being dating him for 4 years he is British iam latina well on agosto I saw picture of he ex girlfriend and he son in New York together, well we have a trip already plan to Dubai . I did not said anything we have amazing time in Dubai when we go back to Miami , and he need it to go back to Dubai for business. Everything when to hell the next day he left , I contact he ex and ask her to explain to me if is any relationship between both of then . She reply to me sayin “ well we being together for 22 years and we have our son together he stay at my house when he comes to London . Well I send her our picture together and the picture of him asking me to marriage him in Dubai . She text him he call me and said to me you fuck this up . Like is my fault he lie to me for 4 years , he also said he is not with her sexual only for he son he is doing that . Well 3 week ago he came back to Miami and said to me the he left everything there and what to be with me get a house and leave together because iam the women he love . Can you lady’s help me please comment