Leo and libra vs leo and sagittarius?

You are experiencing proximity attraction with the young girl at work. This means that the physical closeness you have with her is because you work with her. You aren't in in love. The Libra you have been with for four years is not feeling connected to you, and the relationship is over. If you have been emotionally cheating her on with an ex, you are not committed to her. So, end the that relationship now. You need to enjoy being young, and do not get into any relationship with any girl for the moment.