I'm still very upset about this/need to know if I should distance my friendship

I used to really like this one guy and at one point, we began talking more and getting closer. My close "friend" knew I liked him but I usually didn't bring him up since I feel she has jealousy issues. One day, she asked if I still liked him and I explained that I did a little and also how we got a lot closer lately. A few weeks later he got into a relationship and since I don't have social media, other friends showed me. I also saw that she liked the status/pics of them, so I know she knows he now has a gf. My problem is that she hasn't ever told me and it's been months now. I feel that she's not a good friend and she should have given me a heads up. What do you guys think?