Do not allow your love for triple cheeseburgers and hot fudge sundaes prevent you from meeting the woman of your dreams.
Okay, that is it.
Never been married? So. You might not have met the "right" person for you yet.
Do not have any kids? So. Maybe you have not met the right man or woman who you would trust raising your children.
The two things above should not cause you to be perceived as a "red flag," but there should never be a time in your life where you do not concentrate on self-improvement. Constant self-improvement is the key to a better love life, sex life, and overall social life.