Balderdash!!!! I tell you what. She will always remember you and that she was there for your special time. And your memory will be a long-term relationship. Virtually nobody stays with their first sexual partner, so true love with your first is a terrible long-shot to bet on.
Get on with this. You will have a smile on your face for weeks. You will get over any feelings for the lady and just treasure her in your memory. (Besides, you can always call again in the near future.)
There’s nothing more for us guys to say. Good times to you.