<human>: I have been with my boyfriend for a year and we love each other completely. He is my best friend and I have no desire to be with anyone else. I could really see us spending the rest of our lives together. 

I lost my virginity to him, so he is the only man I have ever been with. We have AMAZING sex (I know I technically have nothing to compare it to but he makes me orgasm multiple times every time and so hard that I become delirious afterwards so I think it's amazing). There's nothing that I'm left wanting from our sex life or even the emotional parts of our relationship.

What I'm worried about is whether my feelings will change as I get older. I hear all these stories about men and women regretting not having more sex or more sexual partners and it scares me a bit. Obviously there's no way to be with other people and keep my boyfriend (I would never cheat on him), but I do NOT want to end things just because I'm scared about maybe feeling differently later. 

I don't know, guys. Guess I'm just looking for some insight if any of you have been in a similar situation. Any advice??

Summarize the given text in a few sentences.
<bot>: I think my boyfriend is the one and I love him, but I'm worried that in the future I will regret not sleeping around more if we get married because he is the only one I have ever had sex with.