Selena Gomez is “so in love” with Benny Blanco. The 31-year-old beauty and Benny, 36, went public with their romance in December, and Selena is said to be loving life with the record producer. A source told PEOPLE: “They are so in love.” Selena and Benny are currently on opposite sides of the US, due to their work commitments. But they’re doing everything they can to make their romance “work”. The source said: “It’s a very serious relationship, and they’re making long distance work while she’s in New York for work commitments.” Selena is currently shooting season four of ‘Only Murders in the B…