He lies about money

As title says really.We have been together 4 years and he has done this a lot of times now. I found out i was pregnant a year into relationship (failed coil) i miscarried but then we decided to try again. The day i founf out i was pregnant again i also found out he had been lying and wasnt going to work (he said due to depression) so i had to have an abortion. There have been quite a few instances now where he has lied about monday. There has been £65,000 worth of dept that was all taken out 3 years before getting with me that has come to light that hes never paid back. I have found letters in the bin. Ive also handed him letters before and then asked what they are and hes lied to my face. He says he was poorly when taking out the loans and he struggles to tell me about it and thats why he lies. Im not sure how much more i can take. He says there are no other debts but hes said that before. Hes done a credit report but there was nothing on it. He has also taken out 2 small pay day loans while we have been together that i didnt know about. Am i being foolish staying?