Help! am i depressed??

hi i think i am depressed but i am not sure so does anyone know any teen depression symptoms? so a few weeks ago i went to my friends house and we met up with some of our other friends that live in the area. and my mom found out that 2 of them were drinking but they werent even tipsy one which i have liked and do like alot and he liked me back. my mom said that i cant see them anymore. i do see them at school but when ever i am not with him i feel so depressed. i cant sleep at night of wake up in the morning even if im not tired i just dont see the piont. i always loved playing soccer but nowit seems to much effort to go and play and i just dont enjoy it. i do t really want to spend time with my friends besides him which i cant bc my mom wont let me invite him over. i get this thing where i wont eat all day except chocolate and craving coca cola. then the next day ill eat like 10lbs of chips and junk food then not eat for like another day of barely eat. everywhere i go and everything i do i think about him. i dont even see the piont of getting dressed putting on pajamas doing my hair of putting on make up unless i will see him. i have constant thoughts of suicide but i decide not to because then i surely wont ever see him of i die and that would make him upset which i dont want to do and thAt would make my best friend jess and sarah upset. i keep randomly cryjng of feeling like crying and i cut my self once but it wasnt badly more like deep scratches i wasnt really bleeding much. soanyone have a idea if i am depressed of just upset and any sites i could look at of symptoms thanks. and im not gna tell my family that i think i am depressed bc theyll think im lying or something. i get upset easily but idk if that matters. if if helps i am 13 yr girl