I'm 18, biological father left when I was 7 or 8. My dad has been with me since I was about 9 months old. Him and my mom divorced when I was 8, but I still went and saw him 3 or 4 days a week. I changed my last name to his when I was 14. I recently got back in touch with my aunt and uncle on my biological father's side, and from what they've said about him, I don't wanna see him again. Go with what your family tells you, they probably know what's best.