So in Love! The Secrets of Taylor rapide, swift and Calvin Harris' Red-Hot Romance 

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So in Love! The Secrets of Taylor Swift and Calvin Harris\' Red-Hot Romance

Taylor Swift and Calvin Harris just celebrated one happy year together with an epic vacation in the Caribbean, and friends of the couple say they\'re happier than ever.

Last year, the "Style" singer and the deejay/producer balanced their blossoming romance with their packed schedules (she was traveling the world for her

while he helmed his Las Vegas residency at Omnia Nightclub in Las Vegas).

Evan Agostini / Invision / AP; David Livingston / Getty Images

"When she was on tour last year, he really missed her and it wasn\'t easy," says a Harris source.

But the duo have remained supportive of each other, and "Calvin often gushes about how proud he is of Taylor," says the source. "He is very supportive of her career and he appreciates how supportive Taylor is of his."

Adds a Swift insider: "She\'s super happy with Calvin. Everything looks to be really good between them."

For more on Taylor Swift and Calvin Harris\' romance, pick up the latest issue of PEOPLE, on newsstands Friday.

When they do get some downtime at home in L.A., Swift, 26, and Harris, 32, enjoy romantic dinner dates. "They are the cutest couple," says a source at Giorgio Baldi, where the couple have been spotted (a fan even crashed their date!). "They always seem to have a lot to talk about and they are very sweet to each other. He is very much a gentleman."

They\'re also enjoying the relationship and taking things at their own pace.

"Of course they love each other, but they are not the type of people to rush down the altar," says the Harris source. "They are both very solid people."

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