PLEASE HELP

so i'm EXTREMELY new to the whole gay thing. i recently met a girl and we just immediately clicked. i had made out with a couple girls before but i always considered myself straight but when she told me she was bi it was almost a relief because i wanted to be with her so bad. we talked for like three weeks then made it official. it's weird because i always avoid saying the word love because i think it's overused but i really do think i love her. the thing is i get jealous so easily and she says she's not gonna leave or cheat on me but i'm always worried that something will happen and idk what to do about it. she's absolutely gorgeous and there are guys and girls who want her. i don't want to lose her, what do i do?