Need some Advice

I have a Boyfriend we use to be collegemates while studying in college he kind of interested in me and he told me i said i am not interested and we moved on with our lifes

After few years he again pinged me and said he still loves me i said no i dont want to be ur lover i want to be ur frnd but he said no i cant accept u as frnd somehow he convinced me

I started falling for him and i said yes to him he was so happy and i am also so happy .. He has a friend (Girl she loves him and she is married) but he said no to her and accepted her as family i mean her, her husband & kid

but she is so possessive about him and blah blah.. He told me about her tht time i took it lite i thought ok its one sided but she calls herself his wife :( :( And one after 8 yrs i met him inperson tht i saw he was chatting with someone in that chat he mentioned i love u.. gud mrng bubbly my lovely wife ,tomorrow mrng i will wake in ur hands and etc etc (thts her) i confronted him he said she is forcing him to do all this she is nthg to me just for her happiness i am dng all this nonsense eventhough i dont like it

somehow i trusted him and took it light and he use to chat with me and we r happy (Forgot to say we both r in other cities) he said after i confronted he stopped saying all to her and talk to her occasionally bcz he feels like she is family.

But few days back i pinged him in whatsapp and she replied asking me who r u ? i dont know how to react so i replied if ur not him y the hell ur checking his phone. she replied i am his Wife who the f r u? i replied he didnt marry anyone i dont think so ur his wife .. she asked me to stop flirting with him and said he doent care about u thts y he didnt tell abt me to u and i said may be he doent care about u thts y he didnt tell anything abt u.. Finally she called me Bitch :( and blocked me in his whatsapp account.

till now he didnt cal or msg me even if i ask him he will say i didnt do anything she is the one who is chated with u i know he will say liketht but i am unable to disgest this i dont know whom to trust??

Do i need to balme myself or him or her.. If i ask him y u gave so much importance to her he says u dont understand she is there for me when ur not

i feel so insulted and so confused hurt upset and sad :( What to do??