I so badly wish my son had a Father/Dad

My son is 2.5 yo, his dad decided to not be involved when I was 8.5 mo pregnant, shortly after id discovered he'd lied about our entire relationship.

We'd dated on and off for about 7yrs

He'd been dating multiple other women, but specifically one wonderful woman (we're friendly and hope for the kids to meet someday) who he was engaged to, married, had a child with and eventually divorced from during those 7 yrs. He has another secret child he doesnt know Im aware of now.

He lied about the conception of both his other children, he lied about his marital status and 1000s of other things. He didnt show up to the hospital when our son was born, but we do live in 2 different states (about 7hr drive). We have not heard from him in 2 yrs this August. My sons never met him, and hes never made any effort to be involved or have a relationship with my son.

The past 2 weeks my son has started randomly calling men we know "Dad" (family friends, uncles, grandpa etc) My heart breaks every time, because i have to correct him, and explain thats not daddy. And I know its only a matter of time because he will ask where his is.

Just typing this, im crying. His dad and I were planning an engagement and to marry, but we honestly had only been back together a few weeks when I got pregnant. Im so blessed that I have my son, but I have a lot of guilt that I put him (son) in this situation. That he will grow up without every experience and comfort that comes with the relationship between a father and son.

I just so desperately wish he had a father, one worthy of him.