Gastric byp? safe?

I'm 19 around 180 pounds and 5'5 well no matter what I can't loose weight. I completly cut out junk food and sugars and only drink water Nd eat small portions. I'm very very. Very sensitive about my body its discusting. So I was gonna get lipo suction but that wouldn't get everything so I'm thinking of. gettin gastric byp but dont really no much about it at all.