Why did he pull away?

When we met he asked me what i want, i said my options open and nithing serious. he said fine. we didn't fully have sex so the next day i was craving his body. It was so lovely , he kept telling me how beautiful i smell and he even told me that i look at him like i knew him from the past. That night was lovely he stayed for 2 more hours after we stopped kissing and we cuddled and talked. he sent me pictures when he was young by the way i got home. He kissed me so hard before he left. I said its better to not talk about how our days go by, to avoid getting attached. so he started not replying getting distant and pulling away. the next day told me we may meet again but not sure and he needs time not to hurry cause im hurt since i broke up recently. I dont get it why would he give me time to heal and not have sex with me since its just sex and we had fun? He kept on saying that he doesn't want something serious too. I ve never heard someone rejecting sex when he had fun because im hurt from my ex and while he doesn't want a relationsgip too..!

Why did he pull away?
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