Calvin Harris and Taylor Swift will always "love and respect" each other.

Taylor Swift

Taylor Swift

The pair recently ended their 15-month relationship and Calvin, 32, took to Twitter to insist that they were still on good terms, with Taylor, 26, retweeting his message.

He wrote: "The only truth here is that a relationship came to an end & what remains is a huge amount of love and respect (sic)."

The tweets came after it was revealed that Calvin - whose real name is Adam Wiles - ended the romance last week.

A source told E! News: "This all happened last week.

"Taylor and Adam had no big blowout fight, but the romance just was not there anymore for them. Adam is the one that ended it. It was all done in a very mature fashion. Taylor is pretty upset but they are still in communication. Taylor was there for Adam with his accident and supportive."

And Calvin - who recently had to cancel a number of shows after being involved in a car accident - had reportedly been "losing interest" in the 'Bad Blood' hitmaker for some time before they split.

A source said: "Adam really liked Taylor, she was not the type of girl he ever dates and he liked that. He liked how innocent Taylor was and that she had a good caring heart. Taylor's heart was more in it then he was. He started to lose interest over the past few months, but really tried to not just break up."

The couple's respective working schedules also didn't help their romance.

The source added: "They were just not very compatible in different areas in their relationship. The touring and traveling didn't help. It seemed like they were more friends than lovers.

"Taylor and Adam had very different group of friends."

And while Calvin may have been the one to end the relationship, the 'We Are Never Ever Getting Back Together' singer isn't hoping for a reconciliation.

A source said: "She was in Nashville with her family and they have been helping her through the break up.

"Taylor was really disappointed in Calvin and felt like he wasn't there for her. The relationship wasn't progressing the way she wanted it to. She felt like he wasn't taking it seriously enough and wouldn't come through for her when she needed him most. She felt down and like her needs weren't being met. She doesn't want to get back together."

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