Guy is giving me silent treatment after I respond late to his messages?

Guy friend is now not responding for several days after he sent me a message asking to consult with me and I responded several hours later.

In fairness to me, he had been unbearable the past few weeks and had been requiring too much emotional support from me and frequently leaning on me. I wonder whether his girlfriend is not supporting him much but he is excessively emotionally clingy to me and also acted very sweet asking me how i am, if my stomach is ok and everything else.

Because I got tired of the dynamics of me being put in a situation where I feel like I have a boyfriend, sharing problems, giving advices, being too intimate, and knowing he has a girlfriend. I took a step back and decided to hang out with other guy friends and posted it in social media.

He must have noticed how delayed my messages are already and decided not to talk to me for several days now. I'm actually more relieved about 60%but 40% is wondering whether I should check on him again. If I do, he is going to really be emotionally clingy and will want us to enmesh in our issues and it'll be crazy again.

I swear it's as if I'm a third party in the relationship with how intimate we are emotionally. He checks up on me everytime and wants to emotionally support me. He even tells me he already prefers to be back in our city implying he does not want anymore whatever relationship he is in. I'm not sure why I'm always in the picture as well. When he got hospitalized, i was also the one who emotionally supported him. He cannot seem to have a problem without dragging me into it and I'm feeling overwhelmed.

I already placed boundaries but he is now giving me silent treatment and it makes me feel guilty. What should i do?

Guy is giving me silent treatment after I respond late to his messages?
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