Of course you can!!!!
My friend got pregnant by an ex, he made it clear he didnt want anythign to do with the baby. On a night out in her early stages of pregnancy she met someone, straight away she explained her situation... It didnt bother him. Afew months into pregnancy when she was showing she thought he would change his mind and he still didnt, her baby is now almost 1 and her and the guy are still together.
I dont know how she would of coped without him! And the real father of the baby has been nowhere to be seen!!!