Clingy new guy

So Recently single(few weeks) decided to hang out with this guy I met on a dating site. We ended up sleeping together and he txt me when I left saying he misses me and can’t wait to see me again. We continue to text everyday and he keeps saying how much he can’t wait to see me again. Two days later we hang out again and when I left he said he can’t wait to see me again. I’m not looking for anything serious... but he keeps saying how much he likes me and he can’t wait to see me EVERYtime We talk. He sends me texts all day everyday expressing his feelings when I don’t reply right away he sends like 4 or more texts at a time.. & it’s kind of freaking me out since we’ve only hung out twice. (It’s been 5 days since we met) thoughts?