LANCASTER (AP) — Golf is all Lexi Thompson has ever known, and one of the more popular players on the LPGA Tour decided Tuesday, May 28, this will be her last year playing a full schedule.

Thompson chose the U.S. Women’s Open — the major she first played when she was 12 — to announce that she will step away at the end of the year. The 29-year-old American became emotional while talking about the amount of work no one sees and the loneliness she has faced.

Thompson said she has contemplated semi-retirement the last few years and cited mental health as one of the factors that contributed to her decision.

“I think we all have our struggles, especially out here,” she said. “Unfortunately in golf you lose more than you win, so it’s an ongoing battle to continue to put yourself out there in front of the cameras and continuing to work hard and maybe not seeing the results you want and getting criticized for it. So it’s hard.

“I will stay, yes, I’ve struggled with it — I don’t think there’s somebody out here that hasn’t,” she said. “It’s just a matter of how well you hide it, which is very sad.”

Thompson is playing her 18th U.S. Women’s Open before turning 30. She won the first of her 15 LPGA title at age 16. She is known as much for the majors she lost as the one she captured at the Kraft Nabisco Championship in 2014 when she was 19.