Does grief ever lessen?

Do things ever get better? It’s been six months since my only friend committed suicide and while things improved for a bit, everything has regressed at this point. Therapy isn’t helping. My master’s program keeps me insanely busy but I feel the heaviness of grief all the time.

I’m making bad choices (financially, healthwise, personally, schoolwise), driving away everyone left, stuck in a rut invisible to everyone.

I feel like things are always going to suck. Like there is no life worth living left. I just want to disappear, forever. Does the grief ever lessen? Does it ever stop suffocating every moment?