I am sorry as I didnt know you are her 1st lover. As to you, do you have enough sex experience to know when a girl has had an orgasm or not? Also you have to understand there are difference between orgasms from straight intercourse and orgasms from cliterol stimulation.
Innocent girls can be taught (trained?) to become great lovers and become especially loyal to the one who has taught them so.
I had a virgin gf before and she has been raised to 'save the moment' for after marriage. Of course being a typical male, I wanted to sleep with her. At the same time I didn't want to force or guilt her into allowing me to shag her as I wanted her 1st time(s) to be as unforgettable as possible. (If you ask other girls about their 1st time, most of them have an ambivalent feeling about it as it was such a let down).
So I took the time (in total it was about 1 month) to slowly seduce her. The whole idea was to get her used to someone else praising her beauty and naked body, looking for all her 'secret passion' buttons, experiencing body massages (clothed at first, then semi-clothed, finally naked) every time so she can learn to relax and enjoy the moment. making out like in those old b&w movies where no clothes are removed, showering together, daty and fingering. Every action on my part was to make her enjoy the moment and crave the next experience (lesson?) from me. Eventually she experienced an orgasm from fingering and exclaimed her joy in experiencing what she has read in books.
During that 1 month, I never at any time stuck my penis into her as I wanted to wait until she finally said 'I want you fuck me!'

So you can say I waited 1 month before shagging her and let me tell you the girl appreciated me for waiting as I spent the time prepping her for the big moment.
Of course to make sure she wanted it, I would ask a few times to confirm it. Then waited until our next meeting before taking her virginity. Honestly that night we could not complete the act because she still had lingering psychological blockages. She experienced vaginismus - involuntary tightening of pussy that prevented entry by me.
I looked into vaginismus and learned what it was and discussed with her that though she wanted to fuck me, she still had a subconscious mental block that we will work to overcome together.
So on next night it was back to massages, alot of dfk, cuddling, and more foreplay with daty and fingering to some orgasms to relax her enough to try again. This time it was a success and we shagged all night and experienced a mini-orgasm (still an orgasm). Most of all she felt extremely happy that her 1st time was something to remember with happiness.
I think you need to start over with this girl and tell her so that in your (guilty selfish) rush (dont blame her) to shag her, you forgot to properly teach her everything about sex. So re-do the whole seduction thing; dinner, walk on the park/beaches (making out on deserted beach is fun), innocent making out (no sex) to bring the romance back into the picture.
Maybe on the side you should read some of those trashy girls romance novels or romance adult literature as it does give an idea what girls fantasize about with regards to love/sex. If you can bring the romance back into relationship and take your time, you may be able to resolve your problem.
The risk is if you succeed into turning her into a sex vixen, she may be tempted to try other guys

. By then if you succeed, marry her right away.
