Something Wrong With Me?

I had an awful day. My coworker notices and asked if I was okay and I said "eh, had a really bad day" and he asked me if I wanted to talk about it to which I replied "no thanks, I don't talk about my feelings" and he said "that's probably a really big issue" and it just makes me wonder if something is wrong with me. I don't like to tell people my feelings because there isn't any point and it's rather inconvenient and I don't really post my feelings online like my friends do because I feel super uncomfortable and attention seeking (not that anyone that posts their feelings is bad, I just feel that way about myself). I don't express my emotions to anyone, I use humor to cover up bad situations and I make self deprecating jokes so people think I'm just the funny guy. I can't afford my therapist anymore and even when I did see her (for 5 years) we didn't really talk about my feelings, we just talked about what's happened to me. Is something wrong with me? How do I fix it?