Too awkward to be a firm owner

I’m an introvert and very inconsistent socially. Sometimes I can be outgoing and confident, but other times it’s like it’s my first day on this planet and idk how to communicate. I started my own practice at the beginning of this year and mostly get clients through referrals from other CPA firms.

Today I had a call with a prospective client. As I was talking to him I quickly realized we wouldn’t be a good fit. This threw me off. He was nice, but he was years behind on taxes and had some sales tax issues that I didn’t want to touch. His business is also a partnership which he didn’t realize. I didn’t know what else to say to him after I gathered info since I knew I didn’t want him as a client. So I basically said “I don’t do partnership returns sorry bye.” My mind just went completely blank. It was so awkward and I fumbled it so badly I feel terrible.

I’ve had calls with leads before that went well. But sometimes I just have a call where I lack confidence and can’t think of what to say. I’m also scared this guy is going to tell my referral source that I’m a weirdo who can’t communicate. People skills are so important in this field and I lack them. Just a vent because I’m feeling like I’ll never be successful with my personality.