You don't give your ages, except to say that about a year ago she was too young to marry. So does that make her around 16ish now? And how about you? A little older perhaps?
When you are in your teens, emotions are heightened because of hormones, etc. It is very easy to fall in love or, at least, to believe that you are in love ~ but this may or may not not be the long-term kind of love that usually results in a successful marriage.
It can, of course. I know people who met at 15 and are still happily married in their late 50s. My husband & I met in our teens and are still together in our 50s (but we didn't marry til we were into our twenties) but this is unusual.
After two months you may have wanted to marry, but that doesn't mean that it would have been a good idea to do so. Even though there are people who meet in their teens, and hope to stay together and succeed in doing so wouldn't usually plan definitely to get married at such a young age.
So, neither of you was unusual in falling deeply in love, or believing yourselves to be in love, or believing that you would love each other for ever and get married and live happily ever after.
However, the fairy tale ending does not usually work out for most young couples. People grow up and change and grow apart ~ and, often, one party is left feeling heartbroken. This happens all of the time ~ to the extent that I would call it the norm. It is a learning experience and the pain will eventually ease.
It is not surprising that she has acted as she has, because it is so commonplace. You were play acting at being married ~ it wasn't real. You are not married. It was something that you both hoped would happen one day ~ but it probably won't, because you are growing up and apart.
Of course, it is possible that you will grow together again, but don't pressure her into saying something that she doesn't actually feel. No-one can help falling in love or falling out of love. It just happens.
If keeping your virginity until marriage was something you feel / felt that you ought to have done, then really that is what you should have done. But you didn't and you cannot turn back time. You loved / love her and it felt right, so do not start feeling guilty about it now, but continue to feel that she was a special partner to you, just as a wife would have been ~ even if the relationship turns out to be coming to an end.
It's not that everything was a lie, Tony. It's not that you cannot trust her. In these circumstances it is just that people mature and change ~ that is a truth. Of course, if you love her and the relationship is ending then this will feel terrible for you. You will have to grieve for it. But you can come through this and find your true soul mate.
I don't know what your religion is, but I don't think that anyone's beliefs should force them to live with someone whom they do not love or who doesn't love them. To me, a morally good relationship is between two people who love and trust each other; not between two people who feel that they have to stay together because they once loved each other, or thought that they did, and decided to sleep together at a young age.
Have a chat with her and see where things really stand between you.
Find out how she really feels.
Be open to the fact that she may be changing and her feelings may be changing too.
Maybe she just felt pressured into accepting a relationship which became too serious too quickly.
You may be able to work this out, but, either way, it is better to know the truth.