Most Helpful Guy
I can thing of a few things you could try:
1. Check if you're using the right size condom width-wise. (www.condom-sizes.org/.../condom-size-chart)
2. Make sure your junk is dry and your girl is wet.
3. Make sure you're fully erect. Maybe with less masturbation and more foreplay. (she gona love it anyway)
4. Take it out whenever you come. Asap.
5. Whenever you are taking it completly out of her, before anything else, make sure you grab the condom with your fingers to help it out.
That's all I can say off the top of my head.