Breastfeeding

I've been breastfeeding my baby since he was born but I'm also using formula. But just last two days he will not latch on me until now it's been three days I guess and I still have milk. I am depressed knowing that he will not latch on me I am doing best to not feed him in bottle when his hungry but still he will not latch. My husband doesn't understand that I am having a hard time he thinks I'm not doing it cause I don't want to do b.f anymore. He thinks it's easy for me .😭😭 What do I do .?Fyi my baby's 5 months already.