I want to know who my father is

My name is Angelica & i am 17 born in 1992. MY mother died when i was 2 & my father disappeared so my aunt took me & my 2 sister in. I want to find my father & see why he didn't stick around & if he even loves me. All i know about him is his name & that's hes white & his age is in the 40 - 50 years that's all i know & i cant ask my family anything about him cause they wont tell me only my older sister told me his name & not to even bother finding him & i want to know why so how can i find him for free & fast