8 years age gap?

I’m 18 and this guy is 26, we became friends and then one thing led to another and we slept together. This happened in a bit more than 2 months. Now we’re gonna be away for a while because of holidays and we never discuss the terms of this relationship. I can’t wait to see him again but I don’t know how he feels about me... Would/could he sleep with someone else?
He said he liked me when he first kissed me, but how much does that really count?
8 years age gap?
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