Broke down after celebrating birthday alone

Today is my birthday, thought that i would be happy but was sad throughout the duration of my working hours. Bought myself a cake anyways after work and celebrated alone in my house. Immediately broke down crying after blowing the candle, it reminded me how im still single without experiencing a relationship at 26 years old; although my work life is fulfilling but my personal life is shit; how no one even my parents remember my birthday. Sometimes i just want to feel validated and loved but somehow feels like im unwanted and unloved. Sorry if this message affects anyone but i just feel like expressing it out today