Dustin Diamond died on Monday aged 44 - just three weeks after being diagnosed with cancer
Diamond was diagnosed with stage 4 small-cell lung carcinoma last month
The actor reportedly had a large lump on his neck and was hesitant about having it seen by a doctor for fear of attracting public attention
His girlfriend, Tash Jules, eventually persuaded Diamond to go to hospital to have the lump inspected; she was by his side when he died on Monday
According to a pal, Diamond is set to be cremated and did not want a headstone because he was afraid it would be vandalized