Conflicted Feelings

Do you have that one person in your life that you are not sure whether you are happy or sad to see them. Seeing them makes you happy and excited- but it also makes them sad thinking about all the memories and fun you used to have? I have been having this internal battle for a few days now. I am struggling to get over my hurt and continue the friendship. I have realized how much this person has impacted me and feel as if I should tell them but I have no clue how without making them feel bad that they left. Any suggestions?