September 12, 2015 11:55 AM

When Rob Gronkowski, the New England Patriots’ resident party boy and star tight end (and amateur twerker), helped lead the team to a victorious 28-21 season opener Thursday, girlfriend Camille Kostek was in the stands cheering him on, a source tells PEOPLE.

Kostek, a 23-year-old former Patriots cheerleader and current lifestyle ambassador for Benrus, was one of the 160 dancers who participated in an on-field pregame performance in the pouring rain.

She watched the first half of the game with friends in the stands, and then headed to a club suite to watch the second half with some of Gronkowski’s family.

After Gronkowski, 26, scored his first of three touchdowns, Kostek Tweeted, “First touchdown of the season #herewego #87.”

Gronkowski and Kostek also spent part of Labor Day weekend together, including dinner at Papa Razzi in Boston, Massachusetts, where she posted a sweet image of her sitting on his lap.

She captioned the photo, “Friday night date night,” with a rose emoji.

The pair, who have been together for several months, seem to be a great match, a friend tells PEOPLE.

“You can tell they really enjoy being with each other,” she says. “They both have a great sense of humor and feed off each other really well.”

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But there’s more than just chemistry between them, the friend says: “They both love to be active and play sports together.”

“And yes,” she adds, “they both love to dance.”

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