I can completely relate. I have an only 15 yr old daughter.
From LONG ago, communication was key and it is key now as well. I try VERY HARD not to push for any info because she will give it to me in her own time. Thankfully, she is very open and communicative with me and I have expressed how I feel as a mom and my daughter going though this stage to her.
She understands that I want to know because things are so different from my "dinosaur days, HA", and she is quite open with me on everything going on with her, her friends, etc.
She does not have a "boyfriend" BUT most of her true friends are boys. Yes she has girlfrends, but she confides in a couple of her guy friends vs boys.
I just try to keep an open mind and whenever SHE wants to chat, I drop everything and chat. Like your daughter, my daughter is not into the sexual arena but she is fully aware of what is going on.
She was toiling tonight over Friday night plans witha couple of guy friends.... I said it is not like you are boy/girl friends and she told me... once of the guys likes me and I don't want to lead him on by hangong out this weekend. Another drama here is the 10th grader who has been "wooing" her and his "rules" were that she not talk to any other guys. She really likes this guy.... I was so proud when she told me " I told __ that I am not getting married anytime soon and a lot of my friends are guys so if you can't deal with that, then we can stay friends instead of boyfriend/girlfriend?" My daughter is not into sex...however, she informs me on who is... Keep an OPEN mind and OPEN COMMUNICATION.
So far that has worked. God bless you.... we are dealing with this drama all the time!! Good luck.