Feeling depressed!!!!

K • Married, mother of 4 and pup

Ok it says I feel depressed, and for the most part I am. But I'm also pissed the f**k off. My husband and I have been together now for a little over 3 years. I have four children that have three different "fathers." (Please no comments, I'm not a slut!) My husbands, for the most part, has treated all my children the same. But here recently, my son (his also) has REALLY been doing his best to ignore him!! He's only 2 1/2 years old, and when my youngest daughter was around that age, my ex boyfriend of 4 years and I had literally just split and was going through a custody battle. But my two oldest daughters did the same thing. So I guess what I'm asking is: is it normal for my son to reject his dad at such a young age? And what should I do, if anything?

Btw, my husband's said he's wanting to spend some quality time with my son, but hasn't wanted to with my daughters. Would that be considered favoritism? And what would you do?

Thank you for any advice and comments.