Ultimately, in the end it is your body, your life & your choice. Yes its his baby too, but how many children are out there that have nothing at all to do with their fathers? My DH didn't meet his father til he was 19. & hasn't seen him since. He would kinda like to get in touch with him, but we don't particularly like him as a person, so we haven't tried too hard.
Besides, DH's mu has been in the same house, with the same phone number for 16 years. He has that number & has not once tried to get in contact with us.
MIL was only 16 with no family or financial support, never claimed child support & raised him & his brother - different father for the first 7 & 9 years alone. She had a partner who fathered the next 2 children (she lost one to SIDS) for about 2 years but he wasn't much of a father.

I know a few people who never knew their fathers, or didn't have much to do with them. Either coz it was the best choice for the child, or just coz he's he's a dead beat dad who couldn't be bothered.

You have to make this choice for you. Sounds like you have family support. Thats a big help.