Calvin Harris is reportedly not comfortable with Taylor Swift's past relationships. The 31-year-old Scottish singer/DJ apparently feels the Bad Blood singer may still have feelings for her former boyfriend Harry Styles.

According to One Direction's fans, Swift liked a post on Tumblr that said the One Direction star was immature when they dated. A part from the post read: "If you think Calvin is a bad person but you keep sending him hate on SM, you are just as bad as you think he is. He is the man Taylor chose to be with, I'm sorry if you live in fantasy land and you think this relationship is a cover up or if you think that a relationship that has been fucking dead for years is gonna 'rise' (with a dude that had no maturity at all)... I'm sorry for Kaylor and Haylor shippers that respect Calvin and Taylor's relationship but end up with a bad fame because of a small and awful part of this fandom, but this situation has to stop."

There is no evidence that Swift liked the post but according to Hollywood Life, Harris was not happy about it. A source said: "Calvin has separated himself from his playboy ways and is all in with his relationship with Taylor. He doesn't like when she mentions her exes. He wants her to not talk about them, even if it's her throwing shade at them. He wants her to be totally devoted to him. He gets jealous thinking that she still may have feelings for people like Harry or others she has dated — it's upsetting to him."

It was previously revealed that Swift was single for a long time since splitting up with the 21-year-old singer. The Red hitmaker split with Styles after dating for two months.

During an interview with Glamour UK magazine, the 25-year-old Shake It Off singer admitted that she does not find it easy having a boyfriend. She said: "There is no easy way for me to engage with romance. I'm really busy, so I can't. And it's a good thing that I feel really independent and I feel that my friends are all I need."

"It's kind of a sad way I got there, though, being shamed into it. What else is it when you have two boyfriends in one year and everyone's calling you boy crazy, making jokes about you at awards shows? That's public humiliation. And I don't think it's fair," Swift added.