HE's BEING WEIRD

k he started sending green hearts yet calls me bby or b still?? we're not datingg but the green hearts have been bugging mee, he tells me that its his own special meaning and that he's not ready to tell me what it means, alsoo i did ask him if he's friendzoning me then he said "nooo why would i do thatπŸ˜‚πŸ˜‚πŸ˜‚" he used to send RED hearts should i be worried? I like him alot i know its still a heart but whyy green when he could be sending me red