'Bachelorette' Reject -- My 'Surprise' Appearance Was Actually Scripted

The dude who tried to crash "The Bachelorette" house on Monday's episode says the show made it seem like he was some sort of stalker ... but his "surprise" appearance was all the producers' idea.

Chris Bukowski tells TMZ, "They made it seem like they didn't know I was coming, but they knew."

If you didn't see it, Bukowski -- a contestant from Season 8 of "The Bachelorette" -- showed up at the house uninvited ... hoping for a shot at dating Andi Dorfman. When he got there he plead his case to producers and security ... who eventually carted him away.

Bukowski now tells us ... the whole thing was a set up. He wanted to be on the show but he applied too late ... and the producers concocted the idea of showing up unannounced.

Chris says they even suggested a romantic touch -- a bouquet of roses.

Check out the video ... he still seems pretty creepy.