Should I not go to the party due to lack of confidence?

I've been invited by an acquaintance to a party because he knew I was single and looking. It's inching closer to the party date so I'm beginning to have a lot of doubts that I would even be received well by others. I'm not looking my best, being stressed out going to school and working full time, gained weight and lack sleep so I'm really lacking confidence. I haven't socialized in so long too so my social skills are kinda rusty.

I plan on going with a friend to ease the anxiety. But I really don't want a bad experience. I can't tell if I shouldn't go just to prevent a bad experience stain in my memory or if I should go, just take a risk and deal with a bad experience. I have been to social outings where its turned into bad experiences, really not looking to add another one to the list.

Should I not go to the party due to lack of confidence?
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