Does this mean That I've cheated on my boyfriend

So I was hanging out with my friends and we were making jokes then we started to talk about our weights. Then I said that I'm really heavy then the other guy said nah let me show you, and he just immediatly lift me up then put me down. After that I felt very weird. That someone other than my boyfriend literally touched me in that way. Now I feel guilty about it.. After that he was trying to flirt with me then I completly rejected him, telling him that I am not interested at all..

Does this mean that I've cheated?.. I am so scared and hate this way that I feel about it.