It was a single act of intercourse.
We did it several times, maybe over a few days, but it wasn't much more than a 1-night stand.
After the first time we stayed together for a few weeks to several months.
We stayed with each other for many months to years.
I'm still a virgin, and I want it to be a one-time thing.
I'm still a virgin, and I want it to happen in a short fling.
I'm still a virgin, and I expect to stay with my first partner for a while, but not long-term.
I'm still a virgin, and I want my first partner to be a long-term commitment.