Being the bigger person sucks !!

So i posted a few weeks ago about the now ex , walking out on me and our daughter . Also 26 weeks pregnant . So I still get along with his parents and brother so I take my daughter there to see them every Thursday night for dinner . He lives there and he has not seen our daughter in 3.5 weeks and he spent a whole 20 mins with her tonight . Even his mum said why are you not spending time with your daughter ? His reply is oh she is ignoring me :-/ etc she is 14 months old , maybe if you made more of an effort she would want to sit with you . I'm trying so hard to be the bigger person by taking her there since he doesn't visit or even ask how she is . How much is enough ? Do I don't bother anymore ? I'm so lost :(