Search Results: girls don''t believe me

So me and my boyfriend have been dating for over 2 years
We have never cheated on each other
He had 2 previous relationships but Im the only girl he's introduced to his parents since Im the longest

Anyway so yesterday we were cuddling and he was playing on his phone and going on his messages
And then I saw a recent message from one of his "fuck buddies" from the past
And I got so angry:

Me - show me your messages
Him - what? Why? What did u see?
Me - show me, give me your phone
Him- ok i will but tell me what did u see first
Me - your fuckin messaging your ex
Him- wtf what ex?
Me - if u dont show me ur phone right now, im leaving now
Him - ok ill give u my phone

Then he gave me his phone and I went on the conversation thread
And that girl just messaged him saying "what u doing now?" But he didn't reply to it

Me - why is she messaging u?
Him - ok first, she's not my ex girlfriend, she was a fuck buddy.. and second, did u see any replies from me? I didn't even reply to her, she always messages when she's bored
Me - why the heck u still have her number?
Him - look she has multiple numbers and multiple facebook accounts
Me - are u talking to her on facebook?
Him - no ! Go on my messenger.. im not talking to her or any other girls..

Then i checked his facebook messenger and there's no conversation between her and him

Him - look she prob thinks im still a fuck boy
Me - but all your profile pictures on facebook, instagram and whatsapp is of us both.. so im pretty sure she knows u have a girlfriend
Him - yeah but she's always been on drugs so she doesn't give a shit.. i dont want to lose you babe please. I value our relationship. I would never cheat on you.

Him - i didn't tell u about this message because you would make drama. But i shouldve told u since you're still angry anyway. You can message her if u want but she will try to piss u off and break us up. And if i was doing something, why would i want u to finally meet my grandparents and my other relatives next week?