Hi wierdologe. I can see this hurts you. I suppose it makes things worse when family members ask questions and pry. Do you belong to any clubs or groups at college? That may be a way to meet people which could lead to all kinds of things.
Some people bloom later than others too. I got in relationships to young. I wish I had used that time to focus more on a career and purpose in life. However, my mother was probably more like you. She went to college, earned a Master's Degree, and did not get married until she was 30 years old. She seems to have had a good, happy life. What I am saying is that everybody is different and each person's timing on things is different. Having a boyfriend to love you is joyful and gratifying, but it is no reflection on who you are as a person if you do not have a boyfriend.
I think someone worthwhile will choose you one day.
