“There were times where I struggled emotionally, however my love for you is enduring and I’m blessed by God to be with my angel on her Birthday. Love you forever. Happy Birthday, baby.”
Earlier this year, the Princess whisked her boyfriend away to a romantic holiday in Hawaii.
The getaway came two months after her ex-husband, Ari Behn, was buried in January.
Mr Behn took his own life on Christmas Day 2019.
The couple shared three daughters together, Maud Angelica, 17, Leah Isadora, 15 and Emma Tallulah, 11.