What do i do

Sooo i’m part of my high school’s band program and we recently went on a trip to ireland for two weeks. The whole band went and it was so so so much fun. I also started hanging out a lot with this really cute senior and we kind of became an item i guess. i don’t know we kissed a lot and we hung out the whole time, cuddling on the bus and holding hands all the time, it was amazing. But, one of my best friends who was also on the trip is really close family friends with him, like he’s kinda like her brother they’re so close. so she got really weirded out seeing us together and she kinda started driving a wedge between us (even tho she introduced us in the first place). the whole trip she would tell me things about him to try to get me to not like him and i’m not sure how much of it was true but basically she was just mad that we were together. then one night when she and i were up late she confessed to me that the only reason she doesn’t like seeing me and him together is because she feels alone (she doesn’t have a bf and has never even had her first kiss). i tried to tell her that it doesn’t matter that she’s never been kissed or anything and that i hadn’t been kissed for a long time and yeah being alone kinda sucks but she’ll find someoneee. she wouldn’t believe me tho i don’t know what to tell her anymore. Any ideas?