Anyone else feel this way?

My ex broke up with me at the beginning of the year and even though i dont miss him for who he is now I still miss who he was before we broke up. Like when I first hung out with him as a friend he was the most loving kind and thoughtful person. but after a year and a half of dating he fell out of love and didnt try to communicate with me at all about his issues w me until he resented me enough to end the relationship. It was going to happen at some point though because at the last few months he became really self centered and overly obsessed with his looks along with only being interested in me for sexual things. I really do not like him as a person now because he still maintained that nasty personality but gosh its like im like mourning who he once was. Does anyone expirience this too??