Dating someone who is moving next year to another country

So I’ve been dating someone for about 3 months. We’ve been official for 3 weeks. When we began talking, I asked him if he plans to stay in California. He said yes, he doesn’t wanna move back to the country his family is in. However, this week I noticed he started acting weird towards me. I thought I was reading too much into it, since he started acting weird after we were physically intimate for the first time. However, today he admitted it’s because he’s thinking about his next steps in life, and might be moving in 1-2 years, but isn’t completely sure. I’m not really sure what to do. Do I continue to date him knowing he’s leaving in 1-2 years, or do I end it now?