My crush and his best female friend are now saying! How can I get rid of this hurt and jealousy?

My guy friend told me bluntly that he only sees me as a sister and not the romantic type when I confessed my feelings towards him. I was heartbroken. He told me he just admitted to his best female friend that he is in love with her and asked her out. I told him, "Well thanks for being honest and have a fun date." Then when I got home, I started CRYING! I saw on his Instagram that they had am amazing date. Now they're a couple. I can't stand seeing them happy. If course I want him and he to be happy but I get jealous seeing them. My best friend told me I need to get over it and move on. There is a lot of other guys plus our childhood friend seems to like me and I'm not seeing that he liked me for a long time. I want my guy friend! I was in bed moping all day and my best friend called and told me, "Get your ass up!" 😭😭😭😭😭