If your virginity is that important to you, and you’ve held out for 11 months because of this tradition, then it would make sense to wait until marriage, and his conversion to your religion for you to give him your virginity. I suspect that if he marries you, you will feel more comfortable giving up your virginity than if you give it to him because he promises to marry you, but hasn’t yet.
If your splitting the costs of dates is because you’re both college students, I suppose that’s understandable, but it’s not very chivalrous. Even footing the total bill for a frugal date like a picnic, or a pizza in front of the television on movie night, shows more consideration of your being his girlfriend, than splitting everything. Some people don’t care about splitting the check, but since your virginity is important to you, I suspect you are traditional in other ways. Honor yourself, by honoring your traditions. If you decide to let go of traditions make sure you do it for you, not for someone else who is not committed to you in any way.
I hope that helps. Let me know how things go.