Having second thoughts about my engagement💔...Please Read...

Im literally in tears right now. Few days ago i found out that someone stole my card so i report it n thankfully ill be getting my money back. Anyways my heart is breaking right now...as me and my fiance were cuddling, he told me he had something to confessed and he wanted me to promise not to get mad. He told me a week ago he found my card n instead of returning it to me, he went and bought new tires to our car. The money that was in that card was for was for things that we had to pay off. Sadly this isnt the first time, i caught him one time putting gas with my card n since then i hide my cards. I mean, im sad that i have to do this but he leaves me no choice. I love him soooo much n i know that most of our checks go towards the,house but im not going behind his back n stealing from him. He kept saying over n over that he will pay me back but tbh i dont believe anything he says to me at this point. How am i suppose to marry someone who lies n hides things from you. He said he only bought tires n from there he lost my card n i guess someone else found it n used it? Idk but im still reporting it idc. He just left to the gym i guess to cool off after our argument and im thinking of sleeping,with my moms tonight. Im soooooo hurt by him, its not about the money...its the trust and the actions he took.💔💔💔