What does it mean if a boy picks you up bridal style even though he has a girlfriend?

Anonymous
There's this boy who I've grown close to, we seem to constantly flirt even though he has a girlfriend who he's been with for a good 7 months! We were studying together today and he just kept tickling me especially my belly, and then he picked me up bridal style and carried me. He has a thing for tickling me, and he also said 'I love you' through text when I was jokingly pissed off with him, and when I joked back the same he seemed happy that I said it back, what does all this mean? Does he like me even though he's with someone? Why did he pick me up bridal style?
What does it mean if a boy picks you up bridal style even though he has a girlfriend?
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