In need of advice!

Alex
Hi guys I'm having a bit of a meltdown ...so for a while now my bfs co-worker has been non stop texting, snap chatting and calling him and even when I'm around. He seems to respond with annoyance but tries to keep it cool to avoid making things at work awkward.. 
At midnight on NYE she was calling him but he didn't answer because we were together and then she said "I'm going to get you in 2016❤️"... I feel like she is being too inappropriate and she knows that I exist which makes me really sad. 
What would you guys do?😭