Being a mom sucks!

Please no judging as I feel like the worst person ever already but I hate being a mom. I know it sounds horrible but I can't help but feel this way.. I have been feeling alone, I feel so overwhelmed that I just wanna cry (I have a couple times already), I'm so exhausted, and I just feel like I wasn't cut out to be a mom. I love my son but it's so hard! I'm always so tired and I've been getting headaches almost daily. Could I be suffering from PPD? I hate feeling this way! My bf hasn't even stayed once to help take care of our son. He will come over maybe 3-4 times a week and only stay for like 4 hours and then leave.. Thank God for my mom. She will stay up sometimes at night when she isn't working and watch my son so I can get some sleep (he usually only sleeps maybe 2-3 hours a night and usually only while laying on my chest so I don't get much sleep at all).. I just wanna be happy about being a mom and enjoy my son but I just can't seem to get happy...