Shall I leave him ?

I am in relationship for about 3 months. First month was ok but since then there are always doubt about him . I have been catching him lying and he is not honest . A little thing then to a big thing . He lying that he was not on social media , he is not into another relationship.
1st time I caught his relation status on his Facebook, he mentioned a girl name . I asked him and he said it was the past . I let it go .
2nd time , he was struggling and I offer him help , we both agreed . But few days after I gave him help, I found out another shocking post ( he did not know that his GF was on social media and everything was on Public post), I could see all the post and his comment on her post . And the biggest surprise was a post from himself ( he forgot to put the post on private ), I saw his picture with his secret lover . He told me that was a past also but it is actually fresh with all the caption saying that the pandemic made him missing her so much (we both actually on LDR ) He kept denied whenever I asked his explanation .
Our relationship always up and down . Come and go, I always forgive him .

The last one (3rd ) was recently , I found out that he was regular on social media , updating and commenting on his GF social medias .
And he publish his affair on FB & IG . but he hide me from his social media . I felt I am worthless for him and he did not respect our relationship . I have enough drama with him . He play victim every time I ask him about his affair . He blame me that I kill his feeling for me . I am tired of him . He play with my feeling . What should I do, I have been thinking to walk away, until he realised that he lost someone who has always been there for him .

But I found out lately that he hide another relationship on social media from me . I found out 3 x and I directly asked him but he denied . He always said that his family knows about our relationship, but actually its only WORDS . I did a lot of things for him and his family but the other girl who got the credit .