"Gwen is very, very happy with Blake. She always acts giddy when she talks about him," says a Stefani source
“They are not engaged yet,” says a source close to Stefani tells PEOPLE exclusively. “Everyone is expecting it to happen at some point, though.”
Currently traveling around the country for her tour, “it seems the timing [for an engagement] just hasn’t been right,” adds the source. “But Gwen is very, very happy with Blake. She always acts giddy when she talks about Blake.”
Echoes an insider close to the couple: “There are no immediate plans for their future, but it’s a serious relationship.”
For much more on Blake Shelton and Gwen Stefani’s life together, pick up the latest issue of PEOPLE, on newsstands Friday.
The country star, 40, has also been very supportive of his girlfriend’s career, and the insider tells PEOPLE Shelton makes an effort to stay “in very close touch even when they’re both traveling.”
WATCH: Gwen Stefani and Blake Shelton’s Relationship Has Taken a Serious Turn
“Blake has been very excited for her,” adds the Stefani source, who says the “Misery” singer, 46, also plans to visit her boyfriend once he begins touring in the fall. “He understands the pressure of a tour before it all kicks off, and he is Gwen’s biggest fan.”
And while they appeared to come from totally different worlds when they first began dating, the couple’s friends say they have much more in common than meets the eye.
“Their relationship is almost too good to be true,” says the Stefani source. “They are very much alike and really have a very special relationship. All the things that need to work out for two people to merge lives have worked out.”