Looks like your PITI is about $1,224 per month. HOA fees seem to be extremely low at $150 a year.
As for me just reading through your scenario, I would advise against selling it. As you have a low credit utilization and eliminating that reporting mortgage by selling it, could lower your credit. Curious how far away do you live from where you work?
My suggestion, the interest rate on the mortgage is fair, sounds like there is equity in the property, market values are pretty steady, certainly selling the property is going to represent a negative impact and a refinance is going to be too early. Why not turn this into an investment property? I don't know what the square foot age is, condition, or how many bed/bath rooms you have. But estimating what similar values are going for in your area could be $1,500-$2,000 per month as gross rental income.
Since, you're single, young, stable credit, low expenses, why not rent a smaller property and hold the current property- receive rental income that pays the bills and generates income/credit/tax write offs.