The last pick

Idk if this is even the right place to ask this. I’m the last pick no matter what. It never bothered me but twice now I’ve gone out with friends and a guy will buy every girl in the group a shot except me and I can’t help but feel like I’m just not good enough or pretty enough. I’m not asking for sympathy or pity. I just wondered if anyone else has ever experienced something like this. It’s never “oh you’re cute can I get your number” it’s always “oh your friends cute can I get her number”