Depression?

Idk how to explain what I’m feeling lol my sister came to visit and she is literally my life practically my baby too lol and she ended up leaving early (I stay with my kids grandparents) but since she left I’ve been like sad lol she made me feel alive made me out lashes on, dress up, she did my hair, we smoked drunk and just had fun and she helped me out A LOT when she was here with my babies and now I’m just sad I try to be happy but all I can think about are our talks and happy moments idk why I’m acting as if I won’t see her again lol but it’s like damn wth wrong with me 😂🤦🏽‍♀️