YOU SAID:
my boyfriend likes his onewheel more than me
INTO JAPANESE
私のボーイフレンドは私より彼の一輪が好きです
BACK INTO ENGLISH
My boyfriend likes his one wheel better than me
INTO JAPANESE
私のボーイフレンドは私より彼の片輪が好きです
BACK INTO ENGLISH
My boyfriend likes his one wheel better than me
That didn't even make that much sense in English.