I'm assuming my mom knows since my other family members have told me that they won't tell me who he is.

I've tried asking relatives. They won't tell me anything. They say it isn't their place to tell me; it has to come from my mom.

Same

look at your birth certificate and search at google.

I wanted to ask my dad. But he passed away before I could.

Maybe your mom doesn't know who he is or maybe he was someone horrible.. You should give her a break.. Sometimes the things we think we want to know are things we are better off not knowing.. But maybe she will tell you someday.. Idk sorry you don't have a father with you tho :/ but not all fathers are nice.. Some are wonderful for sure but others are less than wonderful and in some cases even horrible.. There's all types.. Sigh

Does your mom even know who the father is?