Ugh hate when this happens!!

Was talking with this guy for almost a half yr.We hung out went on dates and had mutual feelings then he goes and disappears on me!!! I noticed he kinda started to stop texting back as often now he hasn't answered me back and it's been almost a week!! Why do they do this... I caught feelings for him😢 guys are something else sometimes I'm so used to talking and want to text him but obviously he doesn't care... how do I get over him?