Is it normal to be in love with your boyfriend but not sexually attracted?

We make year 5 in 6 months. I met him when I was 21 and he 26.

We have been inseparable since.

No trust issues. No jealousy.

No communication issues. No problems at all. Just love.

Strong, unconditional love and an incredible bond.

But somewhere along the line I lost our sparkle.

I no longer get butterflies when I see him.

Or have an insatiable hunger to have him inside me.

To taste him. To touch him. To f*ck him.

Honestly I prefer to masturbate to thoughts of screwing strangers.

But I don't want to be with anybody but my boyfriend. I can't see myself with anybody but him - romantically.

Not sexually.

Is it normal?