When Travis Kelce celebrated his 35th birthday last October, his girlfriend Taylor Swift couldn’t attend the day-of celebrations because she was in the final stretch of her Eras Tour, which recently wrapped up with an impressive $2 billion in ticket sales across 149 shows over two years.

Things are “serious” between the “Fortnight” singer and the Chiefs tight end, who’ve been together for over a year, a source close to the couple told People this week, adding that Swift, 34, plans on spending some downtime with Kelce, 35, after she wraps her Eras Tour in Vancouver on Dec. 8.