I've had a "That one" too - who then wasn't nice to me and then I found him engaged in "adult activity" with several of our friends...... I felt my world come crashing down and suffocating me and the huge emptiness.... I didn't think I'd ever get over him. And like you I had texts asking me to meet up but he only wanted one thing - and that certainly wasn't commitment.
Fast forward a few years I found someone else who I would have given up everything to be with, but they went over to San Fransisco for a job and I was meant to join them later, but that wasn't to be..
Fast forward again and I met Marc. I definitely wasn't going to fall in love with him, we were just mates... We've been together ever since and I never dreamed I'd be with someone for this long! (19 years this year!)