EDIT: Igetit! has it right IMO, this one isn't interested in you, so chalk her up as a learning experience and move on. Just remember to take valuable lessons from it. If you log your conversations, go and review them and find where you could have cranked things up (but didn't), and how you ended up friendzoned.
Okay, here is a tip for you.
Women online feel safe. For a good reason too, if someone turns out to be a creep or annoying, they only need to /ignore (in whatever flavour the particular chat app has) and the problem goes away. So yes, they're pretty safe.
If they are safe, their minds are more open.
Now, considering this, what you want to do is crank up the emotional chat. Yes, some fluff talk is good to have some basics, but you have to appeal to her fantasy after that. She asked about your opinion on drugs? Talk about drugs for a bit, and then start adding up on fantastic things you can do that surpass the feeling of doing drugs. Crazy hypotetical situations. Add her to those situations (in a non-threatening way to start with). Give her some fantasy to build up on, give her
emotion.
I've seen a lot of guys who, when it comes to cranking up the sexual talk, merely start giving the chic instructions on what to do where they're sitting, jumping straight from fluff talk.
Don't be that guy. Give her fantasy.
I've got a date this Sunday with a 6.5, 32 year old asian chic that I met online, and we've chatted all of five times (I think she would be up j0n'S alley, except she's not a MILF, no kids

). The first was long fluff talk, the next two were kinda short, fourth I cranked up the fantasy talk (at some point she said something like "gosh, when did we start talking about sex", so that gives you an idea of how I got there, sneakily with fantasy and emotion), and by the fifth she was fingering herself and telling me how much she wanted to **** me (we both have cams, and I didn't even have to do anything on the cam, my hands didn't stray from the keyboard... hers did). There's absolutely no doubt about what we're going to do during that date.
Okay, it's usually not that fast, I just happened to find a horny one. But believe me, women online are EASY to turn on. ***** shields are typically down or weakened. They're receptive. Go for it like you would do offline on a HB whose ***** shield you've taken down; half the hard work is done for you already.
Not only that, but you'll stand out like a lightbulb in a dark alley if you do that, because they often either get fluff talk or explicitly, direct sexual talk with little fantasy behind. Mind you, some HBs will turn you down if you don't immediately start dirty talking to them and doing all the work - and good riddance says I, don't mind them because your chance of hooking up with them is slim anyway; they just want a quick fix online, and won't put anything on the table themselves. Don't waste your time with those, leave them for the horny teenagers.