how to overcome feelings of jealousy of my friend

I have gone thru so many new life experiences with my best friend and i think i’m jealous of how when she gets into a relationship i’m not that person for her anymore. she’s dating someone new and there’s feelings of worry that i won’t be a priority anymore. i wish i could be in a relationship as well and it is so difficult meeting lesbians here. so the fact that my friend found her match so easily is making me jealous. i love her and im glad she found happiness. but i want to overcome these resentful feelings