i can eat i just got cheated on..

i just found out that my gf cheated on me with the same ex friend that my last two gfs cheated on me with. this ex friend was like a nerd in high school, then when my first gf cheated on me with him he gained an ego, and ever since has been harrasing my gfs until they sleep with him...i cant believe the girls do that tho, i just feel sick and disapointed in women...i cant eat....