Hurting pls give me some advice

I feel so heartbroken struggling to get over a 5yr relationship..its been 2 and a half yrs and some days are good and some are not..I just feel like the bad days are everyday...I try not to think of him or us and yet I still have hurt in my hurt like something is missing from my life most days I am happy with my current partner (1yr 1/2) but most days there are moments I feel empty I don't know what to do anymore

I've been feeling this way for too longs it's taking a toll on my life

I have to hide my true feelings from everyone and it's changing me as a person I'm becoming heartless I care less about people's feelings

I just want my heart to stop hurting

I physically feel a pain in my chest daily