I'd try to sell/swap it, it's too big. Problems I'd think you have?
- Top tube smacking your groin, awkward to mount/dismount
- might not be able to set seat far enough down, excessive leg extension
- Getting the correct reach will mean having a really short stem/shallow bars. Not a big deal but I've found finding a less then 80mm stem to be challenging (on a budget). Threadless stems are easier to find that short.