am I psyching myself out?

this is probably gonna sound dumb but whatever. so Im studying abroad and met a guy studying abroad somewhere else thru mutual friends a couple weeks ago. we were drunk at a club then had sex and I didn’t sleepover. saw him again last weekend and hooked up again and stayed the night. it was fun and we hooked up several times in the night/morning but wasn’t as good as first time and was an okay/good night. I texted him a day later saying I had a great time and left his shirt on his bed. he responded saying thanks for leaving the shirt and I had a good time too. I sent another text way later cuz I was flying and he didnt respond to it
(maybe not response worthy?) but liked my instagram post several hours later. I was told he was into me after we hooked up the first time but now I’m like unsure of how to approach. I won’t see him again for at least another month. am I overthinking things and everything is fine?