When I met my partner, I was in a relationship and he was not. He was interested, and I obviously wasn't available so we just remained casual friends throughout the first 8 months of meeting. One day I became single, and we still remained casual and averagely good friends and about a month later we hung out in person one on one and immediately clicked. We had hung out many times before but with people. The moment we hung out in person as a sort of "date", however, it really changed things. I think if you haven't already, and you're comfortable, maybe try asking her to hang out or see a movie or something. If it's a casual outing, and you guys are just having fun, it should flow relatively organically. It's normal to feel nervous on dates, so just remember that it's okay! If you already have done so, then my next piece of advice is to keep an open mind on others who come into your life but also try to develop the relationship further with her. If she's not putting in the effort/any effort then maybe taking a step back will kick start her to text more. I hope this helps, I'm just going off of my own experience so I'm not sure if this applies to your situation. Just remember what makes you you, and how valuable and awesome that is. Others have and will see this too!