stealthkills12

I was downloading the Beyond Skyrim mod set, and i went to go and play the game, the game crashed while trying to reload my save files, as i had added new mods, i thought "no big deal" tried to boot the game, the launcher came up i clicked "play" the launcher went away, and then nothing happened, i tried rebooting my computer, and steam, and checking the file integrity. But nothing happens, it keeps doing the same thing, and i dont know what to do. Please help!