I've always had a hunch that my dad wasn't my biological father because I look "just like my mom's side." My dad walked in on my mom cheating on him in their bed, which is why he divorced her. It's been about 20 years since they divorced now. I'm 28. I finally convinced him to get the test done because I simply don't trust my own mother, even though she has assured me previously that there's no way it's anyone other than my dad. Turns out my hunch was right the whole time.

I called my mom and confronted her about it and she went from "that's impossible" to "I didn't know it was possible" to "it was a goodbye thing with an ex boyfriend" (even though she was engaged at the time I was conceived). She knows the name of the ex boyfriend, but that's literally it. She says they were dating for 8 years "off and on," but she literally only knows his first and last name.

I want to find my biological father. I don't want any money from him, and I don't want to play catch with the guy. I want to know if I have any siblings or cousins that I don't know about. I want to know who he is. I'd like to know something about my heritage.

My question for all of you is how do I go about finding someone with a super common first and last name who seems to not have any social media accounts? (old man)