You know what's best for you regarding love and romance, and you're better off being single right now.
You like being single, and that's the way that goes. If being a partner is great for the other people in your life, then whoopee for them.
Being single is the only way you've come to experience happiness in this life. You may be someone who adores the company of people.
You will tell this person that you aren't 'commitment material' and don't want to get much heavier than that while you'd like to remain flirty.