1997 Chevy Cavalier Will Not Start No Matter What I Do!

Heres the story. I have a beater cavalier I drive in the winters and park for the summer(its really not a beater its actually pretty decent). I parked it this april and tried to start it a few days ago. And it would barley crank. Then when I hold the ignition key it trys real hard, and the more I do it the deader it gets. I tried cleaning all my cables and charged the hell out the battery. I tested the battery over and over and it is reading great(12.5v) So I bought a new starter\solenoid and installed it. This is an easy one you dont have to measure the flywheel or use shimms. Still the same problem. It seems like after charging the battery, or when jumping I get more of a reaction.A clunk. But then nothing. The only major thing I noticed was a fuel leak back by the filter and I fixed the leak.I can hear the pump turn on when you turn the key. My alternator is only a year and half old? What can happen after sitting stationary for 6 months not in the cold to make this happen? Am I supposed to see the starter solenoid actually "turn", also I can see the ignition switch and cable move when turning the key? I am lost. When I have somebody pump the gas when turning the key I can kind of smell it up front, but I thouroughly inspected for more leaks and there were none! Somebody told me about the windsheild wiper motor( which was a pain but I replaced it last winter) having to do with the ignition, is that true? I have a feeling the battery is screwed up but it only about 11 months old and tests fine? How come the damn thing just wont start! Thank you for your time