So I’ve liked this one guy for a good 5 years, I’ve dated inbetween those years but I ended it with all of them because I felt guilty for dating somebody and liking another person while dating them. I know this person doesn’t like me but I don’t know how to get over him. he’s really nice to me and he thinks of me as a sister. Every time I think of him I get sad, any tips on how to get over someone you’ve like for this long?