Feeling pressured

I’m a freshman in high school and I feel so inadequate to my sister (she’s a senior now). When she was my age she had a boyfriend. And I don’t. I feel so unwanted. After she broke up with her 2nd boyfriend (they dated from junior to middle of senior year) she already has a new boyfriend. A lot of people I know have boyfriends or have had one. I haven’t had one or even been close. I feel so undesirable... my family always jokes about when I’m gonna get a boyfriend. It makes me sad knowing I’m so far behind everyone