Count, you really need to have that conversation. It might not be easy and you might get answers that you don't like, but I don't see any other option than to tell her how you feel. If in the end, she wants the career more than you, there's not really anything you can do to change that so it's best to just get the answers now than let it continue to muster inside you.
Chino, I'm sorry but I really think you need to cut ties with this girl. The on/off thing is way too emotionally stressful and won't ever work long term IMO. We're only getting older. That was my big regret with my x fiance, I let that thing go on way too long when it was clear we couldn't hold a healthy relationship together.
As for myself, I haven't had sex since September and haven't gone on a single date since breaking up with my x back then. I've hardly tried, but I changed my bumble pic a couple weeks ago and got a bunch of hits, including one girl I've been texting with a lot. Maybe, just maybe, I might be able to go on a date.
Also, I did a face time chat with another girl a couple weeks ago. I was pretty sure I wasn't too interested in this girl initially but when she offered I figured I could use the practice. Funny, I thought it went really well. 45 minute video conversation flew by and she was much more attractive than her pictures... sadly enough, afterwards she said she didn't want to continue
funny how the tables turned, but it's all good. That was much needed practice for when I want to actually pursue a female, which I kind of am doing with this girl I've been texting. She's much prettier than what I typically can get, she's super smart, owns a home, works hard... I just don't want to blow it from my current inexperience.