PP Depression?

Can I get Postpartum Depression a year & a half after having a baby? I was wanting to be so positive & happy in life. Lately I've just felt drained & unhappy. I'm a SAHM & can't sleep or wake up when I want because of my son. I can't do much of anything, I feel like I need time to relax. My bf works & comes home to play his games which I don't mind, that's his peace & hobby but I don't have one. I can't when my son is constantly grabbing my leg, crying & being super clingy. I'm currently in the bedroom away from my bf & son because he agrees my son may need some time away from me & I the same. I don't have friends or anyone to talk to & I'm not sure what I want or need. I just feel unhappy & tired all the time.