Torn between two lovers

I just ended a 6 month relationship with a great guy ("Will") to be with a guy ("Adam") I had a 3 month affair with last year--after a month with Adam now, I'm torn between the two.

They are completely different individuals. Will and I share so many of the same interests, goals and beliefs. We can talk about anything and everything, he makes me laugh, I'm a priority for him, he believes in me and wants me to be the best I can be.

And I know he would be there for me and take care of me no matter what.

Then there is Adam.

A strong attraction that has not diminished over time. We don't share many of the same interests and conversation is sometimes limited.

However, I feel like I can be more of myself with him rather than what someone wants me to be. However,I'm not so sure he would be there for me no matter what--I'm 10 years older than both but don't look it at the moment and I often wonder what will happen when I do begin to show the age difference.

Will Adam move on to greener pastures? I have much less trust in Adam than I do Will.

I have to choose. Do I choose the sure, steady Will that I share so much in common with? Or do I choose Adam--the one that seems to have some magnetic hold over me but I feel like will leave me in the end? This is an emotional rollercoaster! Advice!!!