>want to lose some weight and get more fit
>go to friend for advice
>we jog together and he lets me work out at his place and use his equipment
>want to practice sparring with him
>he teaches me about shadowing boxing, how to jab, how to not make panic moves, etc
>after awhile he tells me to try to go all-out on him
>end up making him trip
>he pulls me down with him
>I'm on top of him
>I lean down about to kiss him
>he pushes me off and tells me "You just got your first boyfriend and I don't want to ruin that for you"

We didn't kiss. He told me to go home and that maybe we probably shouldn't work out together anymore since I already got the basics down. We have been friends for 2 years. I'm 22 and just got my first boyfriend with the past couple of months. I'm not interested in pursuing a relationship with my friend, the almost-kiss just happened.

Is this something I should tell my boyfriend about or should I keep quiet?

I just got my first boyfriend and don't want to screw things up already.