Dear client
You have to make sure if what you feel is really love or a matter of convenience. Also whether the feeling was mutual. Your partner comes across as a practical person who can keep her sexual needs and needs of stability seperately.
Next Steps
If you are insecure even within 2 days of loosing her then you were obsessed with her. You can have a talk with her and reach a mutually satisfactory solution.
Health Tips
You have known only this relationship. Give yourself some time. With time and maturity you will be able to overcome your heartbreak.