My friend is jealous of me?

The girl who is jealous of you, how long has she been your friend? Maybe she misses having you as a friend, one on one. My best friend and I used to do a lot of things together all the time. She now has a boyfriend and it seems he is around always. I still spend time with her but we do not share the same special time together and I miss that. I am a straight guy and considered having a relationship with her but the chemistry was not there and we both knew it. We are still great friends but still I miss our one on one time.