i’m scared that my best friend is going to ditch me for a boy

my friend has been talking to this boy (who’s a mutual friend of one of her other friends) over snap for a while and they’re both really into each other and are going to meet for the first time this week. i have a feeling they’re going to start dating but i’m kinda scared. he’s literally all she talks about which is understandable but it’s gotten to the point that whenever we’re hanging out, she constantly ignores me so she can text him and we can’t have one conversation without her bringing him up. i was having a really bad day a while back and i facetimed her because i needed someone to talk to and i could barely get a word out without her going on about this guy again. i have a feeling that once they start dating she’s going to ditch me completely. and this has happened before, whenever she makes a new friend, she kinda pretends that i don’t exist for a while and treats them as her “shiny new toy” but now that it’s a boyfriend, i’m kind of worried that she’ll push me away completely. and i don’t know what to do. so i guess i’m just looking for advice? lol.