If they never text back, leave them alone. If they always cancel at the last second, leave them alone. If they find any excuse to not hang out or go radio silent, leave them alone. If they disrespect you, leave them alone. This applies to people you just met, people you've gone on dates with, people youve slept with, etc...don't make excuses for their situation or try to rationalize it in your head. It's toxicity or neglect that you don't need in your life. TL;DR- stop wasting time on people who are toxic or don't give two shits about you.