“6 months with you is worth a lifetime with anybody else,” Simpson wrote alongside a photo of Cyrus, 27, shared to his Instagram Story on Tuesday that showed the “Party in the USA” songstress grinning as she looked off-camera while sitting at a dining table.
“I love you,” the 23-year-old added in the black-and-white snap.
Simpson and Cyrus have been nearly inseparable since they were first linked together in October 2019 after the pair was spotted kissing in Los Angeles. They’ve since debuted a number of matching tattoos during their brief union as a couple and have spent Halloween, Thanksgiving and Christmas together.
Cyrus, 27, had been previously married to actor Liam Hemsworth, though their nuptials lasted less than a year and the former pair separated in August 2019.
Before Cyrus landed with Simpson, she also carried out a fling with Kaitlynn Carter. As for Simpson, his most serious relationship was had with supermodel Gigi Hadid.
Hemsworth has since been linked to model Gabriella Brooks.