You can just be upfront and ask him. However, this can be a terrifying situation and most guys will not admit to it, especially when confronted or caught off guard. Plus, you don't want to come off as too strong and be misunderstood. The signs are as bright as the daylight but you can be blinded, especially if the guy means something more to you already. Before you fall any deeper, open your eyes and look for the following signs to know that he only wants to hook up-then run as fast as you can. Does he ask you personal questions?