I've been getting this response lately. Don't get it wrong, is not like I'm hurting girls, they say it because of the way I treat them, let's use an example of something that happens quite often:

I see a girl with who I flirt, I go and say hi and give her a kiss in the cheeks and she says: "wow you are too aggressive" in a kinda flirty tone. She said it because of the way approached and kissed her, like in a bold, with intention and confident manner. Even with a bit of "force".

The thing is that I've got this response sometimes and is always in a flirty tone. My worries is if am I really being aggressive and I don't know it because I'm doing a it without really thinking about it or if it is that the girls love this behavior and are just testing me.