Everything else I can agree with except this. I'm not going to try and explain this, because honestly, it can't be explained. Sex, and its connection to love, is something that can't be understood until you've experienced it.
You've made the decision to wait until marriage, and that's great. Basically, I'm just cautioning you against making claims like the one I bolded, because you don't know what you're talking about.
Now that I read what you're saying here, I understand
exactly what you mean, and I agree. Unfortunately, a lot of people take this whole thing to mean "How can you buy a car before you
test drive it?" Which now that I re-read it that's not what you're saying. Sorry about that, unfortunately that's what a lot of people think these days, that if you don't know how the person is in bed, you can't "be in love with them."
I do know that psychologically your affections for someone are incredibly magnified after having sex (more proof of a design that sex was for marriage only) and I'm assuming this is what you're referring to. It is, Biblically, the two becoming one flesh (Genesis 2:24). Later on, in the New Testament Paul states that the man's body is not his own, but also his wife's and vice versa. And, that part, I obviously don't understand. But I would say that someone can fall in love before having sex, but it obviously does not compare to being married (being one flesh) with someone.
That I understand, there is a great difference between before sex and after. But I would say that there is a state that can be called 'being in love' prior to having sex, but love cannot grow as much without as it can with sex.
I think being in love is similar to a flower. You can plant a seed, water it, take care of it and let it grow, but for it to become a flower, it must bloom. For that reason I would say that love can exist, but does not come to fruition until after one has sex.
So I would instead say that one is not technically in love until after sex, but one can be at the budding point of the flower, and make the decision that they know that they want it to blossom. Do you see where I'm coming from? That the prerequisites for love can be there, and that allows one to make the choice to really be in love.
This is why I'd discourage people from having multiple sexual partners because it does mess with your perception of love. If you throw around that bond that is formed when you have sex, it becomes much less important and dulled when one actually reaches marriage.
So, Jam, I would admit, you're definitely in the right here. It's just for different reasons than why the average person would say so.
EDIT: Actually, the way I'd put it is this: Until sex, you have the same love qualitatively for a person as you would a best friend with only hints of what is to come, after sex, you gain the actual romantic love. That's it put a bit more concisely. Jam's right, it is hard to describe, and even moreso for someone who's still a virgin.