I wouldnt stress about not texting and being too needy. Look if teo people are into eachother they enjoy enjoy eacothers company and conversation. If you play silly games or apply arbitrary time rules then you might ruin it. 

Be honest about your career and time. If she is into you she will see you when she can. If you are into her you'll make the time. 

Lastly, the friends issue is the most difficult. If you do get serious and things dont work out you may lose a friend or at least have some awkward moments. I would say its worth it.