Advice: I have a crush on a guy who is seemingly bi, do these messages seem flirty?

I have recently become good friends with someone who shares many of my interests, and it seems like there is a strong emotional connection between us, like us sharing our feelings and maintaining long eye contact. I recently asked him if he was gay (included below), and he said no, so I believe he is bi based on my earlier finding of him on gay Tinder and straight Tinder.https://ift.tt/2pLVGZ5 these messages convey flirting or a sign of interest in your opinions?Also what did his response of “Well Fingers Crossed” mean in that context?Thank you all for helping an anxious college student!Edit: For context, our “slumber parties” consist of us drunk snuggling and spooning throughout the night.Edit 2: More “flirting”: https://ift.tt/2urvRlA