YOU SAID:

I think that my boyfriend os cheating on me

INTO JAPANESE

私は私のボーイフレンドが私をだましていると思う

BACK INTO ENGLISH

I think my boyfriend is cheating on me

INTO JAPANESE

私のボーイフレンドが私をだましていると思う

BACK INTO ENGLISH

I think that my boyfriend is cheating on me

INTO JAPANESE

私のボーイフレンドは私をだましていると思う

BACK INTO ENGLISH

I think that my boyfriend is cheating on me