gave my number to another guy

This guy that comes into where I work who I've told I was married, was hounding me for my number tonight saying he just wants to be friends. I don't know why but I said okay and gave it to him (in my head thinking when he text me I'm going to tell him we can't even talk as friends or just block the number. So he text me and I just delete the message and block it. I have social anxiety and confrontation or rejecting people is not my thing. They usually stop when I say I'm married and it's not a issue but I felt a little coronerd tonight. Well I didn't tell my husband but he got on my iMac and the message came up. Of course he was mad right away and I tried to lie, another mistake I know. He actually guessed what I did but when I admitted it he now thinks I just got the idea from him. He says I have to quit my job or he's leaving. I don't want o quit but or relationship is more important to me. Any advice on the situation ? I feel like the worst wife in the world. I'm already battling depression and I'm feeling more suicidal than ever (don't worry about me I won't let it get that far)