iTunes 11.1.8 doing weird things, really weird things.

Hi

I have had an Mac now for more than 4 years, and it have worked perfectly, but now it seems to have developed a quite odd problem. When i play a song in iTunes, it pauses and changes song, backwards and forwards, by itself constantly. This is extremely annoying, as i now cannot listen to music on my Mac. I don't have shuffle or anything turned on, i tried disconecting my keyboard and mouse, to see if it was a button that was stuck or something like that. But it kept on doing it. I'm really desperate, as i listen to music all the time.

I tried to screen record it for you guys, via quicktime. But it turned itself off everytime i started recording, so maybe the problem isn't only iTunes... Idk...

Thanks in Advance