husbands female friend

My husband has a female friend with who he has been friends with for years. I feel that she is stepping on my boundaries as she will get physically really close to him , drunk dial him at night, wants to constantly meet with him or go on vacations with him. I have confronted the issue with my husband but he says i m just being jealous, but i feel like boundaries have not been respected. now inorder to avoid the issue he tries his best to ensure his friend and i are not at the same party/place at any time. please advice.