Should I just let him go for good?

My friend Ben and I were best friends and we used to be really close. Then a while back,his mom died ( mine died a month before) he was there for me but when his died, you blocked me out of his life, never calle, no IMs, never stopped by, never saw him at work. I was worried about him and then a couple months later( as in last night) he comes out of the blue on my door" can we talk?" he said he was sorry for what he had done. But all these feelings came back, should I just go back to the way it was before?