Boyfriend wont stop lying to me

so my boyfriend of 7 months is lying to me.
ive known him for 2 years but we started off as friends, although hes always had feelings for me.
anyways, ive always been super honest with him about my sexual past, he probably knows too much because im an open book. he on the other hand has lied so many times about his past. he was a sugar daddy for awhile (even asked me when we were just friends) - at first he said i was the only one he asked, then i found out about another girl he gave over $500 dollars too. he swore on my life prior that he never gave money to anyone. i went on his computer last month and found DOZENS of text messages of him talking as a sugar daddy and giving them money
another thing he lied about was a matching tattoo he has with a friend, (shes a girl and they never dated) yet he still lies about it ( i found pics and messages of them talking about it)
another thing hes lied about is his body count. he says hes only had sex with 5 different people but ive found messages of him even nude photos of him getting head and sticking his dick in someone and it was way more than 2 other people (besides his ex"s) i also found a nude photo of a girl on his computer of a girl he still follows on instagram, hes tattooed her (that i knew) but he told me his friend hooked up with her and that they were never sexual. among some other things hes lied about.
i dont understand why hes lying about this stuff. its insane to me and idk if this is pathological lying behavior or if its normal to lie about your past? but hes swore on my life about things that i already knew the truth about.. and i just dont know what to do. he does love me and treats me good expect for the lies about his past. he also told me that hes never said i love you to his ex's that hes dated for over a year. idk. just weird. any advice or wisdom? please let me know,
sorry this was long.