How do I control my lust?

[Avada Kedavra]

I am a socially withdrawn guy with no future plans, who only believes in present. Sometimes laughing seems a crime to me. I feel weird in crowd and many people rearrange their hair after looking at me (why?).

I am usually normal and repulsive for most of the time and ain't interested in Girlfriend type things, but sometimes, I mean just sometimes, I feel like a testosterone rush. I am unable to control myself and and there comes flood of thoughts of getting installed in her. I just want to get dissolved in her. I feel like I am falling for her and it becomes very difficult to control myself.

So, are there some yoga exercises or something like that to control yourself? These happen very few times. Please don't suggest any lovey-dovey suggestions.

Practical and Meaningful answers will be applauded.