I think memories are not to let you go to shield someone or even with someone, they help you remember to motivate you, to grow things. The memory of the thing is left in order to leave time shadow. Memories are a good thing and God gives us memories which means he wants us remember something interesting, bad, happy…So you don’t need to forget any memory or remember any one.You only need keep the memories. If it is happy, share it with your friends. If it is not, find something that can help you and remember so you don’t do that kind of thing again.