Dating someone for 3 months, then radio silence

I met this guy online and we had been dating for about 3 months. Neither of us wanted a relationship when we met but we both began to develop feelings and realize we care about each other. However, we both mentioned being scared and not wanting to get hurt. Things were going on as they have and then suddenly less and less. I was given a roundabout answer when I asked about hanging out again. I was upset and didn't write back. Now it's been 5 days and we haven't talked. I don't know what to do. I'm terrified of wanting more, but I don't want it to be over. I really care about him. Idk if he's scared or just not interested. Any thoughts?