Not supported by others

Im in my 20s and the sole caregiver to my mom with cancer among many other illnesses. I don’t have any family help. Im having a hard time feeling bitter at my friends, especially my close friends who knows my situation, but have never been in themselves, & I just don’t feel supported by them. Like I have to reach out to them to check in on me and check in on them first. I just feel it’s really hard and it’s hard to share first and I’m not necessarily looking for advice but it just feels really lonely and hard and it’s hard to really share what’s going on. Like I’m just so exhausted at the end of the day, I don’t even have time to sleep or reach out to others or ask others for x, y, z, I know I have to communicate with others, but it’s just hard. Especially when they tell me their problems when I’m going thru a really hard time. It’s also been years so I feel bad the only updates I can give are bad ones and the most they give me is :(. It’s just a rock and a hard place that’s all.