Sounds like the start solenoid has gone bad. First check the wire leads to the starter to make sure it's not corroded off or damaged in anyway that your starter and solenoid is not getting any power.
Keep use posted and we can go from there, Auto Zone or Parts Source can check your starter for you when you remove it. Always have the starter or alternator tested before buying a replacement part, just to make sure your not spending any more money then you have to.