My best friend hates my boyfriend?

ok my best friend in the whole world hates my boyfriend. Like before me and him started datin me and my friend were usually together. If i wasnt at work or school i was usually in town with her and a bunch of friends. Well i work with the guy im datin and its the best relationship ive ever been in. I personally think shes jelous because she didnt have a problem with him until we dated and me and my guy were talkin for a couple months before we made it official. I feel bad bc at times i wanna look at her and tell her to grow up and be happy for me but i dont wanna hurt her feelings...i need help. I really love my boyfriend and i love my best friend i just dont know what to do....HELP!!!