HELP my friends crush told her he loved her but I don't believe him

ok so me and one of my best friends are in 8th grade. So she and this guy like each other and she asked him if he still he liked her and he said no he loved her. So me and him don't get along because he sends me pictures with his shirt off so I blocked him on snapchat. Apparently he told my friend that I sent him nudes.. Which I would never do and now my friend seems to think that I'm jealous of her and him. This guy is really immature and my friend really seems to think that they could have a future together (again we are in 8th grade) her parents think that they are just friends and she has a secret phone that she texts him with and night and who knows what else and this isn't like her at all. I really don't think this guy is right for her please help me convince her that she believes me.😢😁