How can I ask him if he is serious about me?

So I have a classic girly problem but I've been racking my brains trying to figure out what to do or think. I've been seeing this guy for about 2 months- we've spent almost every weekend together dinner dates, lunch dates the works! I've been treated so badly in the past and he's the first guy in a long time that makes me feel comfortable/special. The only problem is when I talk about the future and subtly discuss the way we feel about each other he shuts off.

I don't know whether it's because he's got a fear of commitment or whether he just doesn't like me that much and is just enjoying the company without the ties. I don't want to let myself really like this guy if he's not in it for the long run. I know if I'm feeling this way I need to have 'the talk' with him but it's so hard to gauge how he's feeling or find the right time.

I feel like a ninny asking for advice over something so trivial- especially when people have real problems but I just don't know what to do! I know deep down it's because I have really strong feelings for him and so I don't want things to end I equally don't want to be hurt again! I have no idea what to do any advice would be amazing!!!!