How to get him to f*ck?

off? he keeps on texting me and being super needy and im really busy im so stressed i cant even eat or sleep properly and him texting me every couple minutes isnt helping. i've tried to be nice but its not working. i like him, but hes way to needy and pushing my buttons. its only been 2 days since i saw him last, we just hung out and hooked up. if i get more involved is he gonna be worse than this? cause seriously i need my space and hes not givin me any!