Extreme sadness

Sooo I thought I could just suppress the feeling of being extremely sad to the point of being emotionless and feeling empty in the pit of my heart but I literally cannot escape it, it’s been like this for a while now and I just really can’t handle the effect it’s having on me, I’m so easily to cry and to get angry etc I absolutely hate it but don’t know who to turn to, no one seems to really be open for me to talk about it with, or when I briefly say nothing ends up helping or they just forget and don’t care. I’ve had this underlying for a few years now but just ignored and suppressed it but I don’t really know how long I can do it for much longer, I try to take my mind off everything by exercising or dancing or going for bike rides but when I’m alone with my thoughts it just rolls all back in