Do you think a guy who has a baby with a woman has feelings for her?

But they are not together? They have a daughter of 10 months she's both their first, apparently they used to go out for just a year then split then carried on seeing eachother then she got pregnant. I'm seeing him now and i really like him but he wont tell her we're an item?? we've been going out for nearly 3 months now, he has his daughter every weekend he really dotes on her which is sweet but she's not mine so its hard for me. Plus he see's her mum every weekend to pick and drop her off, they txt about the baby sometimes during the week and it pisses me off as ive seen the texts. I found a text in his sent items about her being a strong person and at the end it said you have made me smile this year, but it was a pass this on to 10 people sort of txt, she's a pretty girl do you think im wasting my time i just hate her.