I hate myself

My boyfriend and I are meant to be going out tonight clubbing. So I had to go and get some new clothes as I don’t have any suitable. I’ve been out since 10am. it’s now 5pm and I haven’t found one thing that looks good on me and have decided to just go home. I feel so heartbroken and my confidence is so knocked. What do I do? I only have leggings and some nice shirts but I feel as if other girls there will be wearing dresses and I’ll look terrible. I feel so sad. How embarrassing.