Why is a guy friend too emotionally attach with me?

Lately, my guy friend has been sending me messages asking me how i am, letting me know what his plans are without me asking and consulting me about things but he noticed I had become nonresponsive. At first, he was worried about me he told me because im nonresponsive. As of late though, it looks like he is upset with me because I responded late to his message so he is not responding.

The past few weeks I became overwhelmed because I realized he is still not over with his ex and they went on a trip which caused him to be in an accident. I got so stressed out because instead of the ex supporting him, he sent me a message to check up on him before and after the surgery so imagine we exchanged messages back and forth prior to the surgery and right after plus he also depended on me for almost every problem he has. In fairness to him, he does emotionally support me as well and would even prefer if I share my problems.

Since I got overwhelmed with his issues, naturally, my impulse was to avoid messaging but his messages were constant. It is as if for every problem he has, he always wants me included. I don't know why he is asking for too much emotional support from me.

He is also quite emotionally invested with me because he checks up on my health and is very sweet through messages. He told me he's going back to our city for good implying he'd rather not stay with his ex but I'm getting tired of the drama.

Why am I always in the picture? I feel like I'm a third party in a relationship. I have close relationships but none contacts as much as him. He also wants to talk and ask how i am multiple times in a week, share our problems together and emotionally depend on each other.

Now, he's not responding because i think he got hurt by my delays in messages. Plus, i also took a photo of another guy friend and me meeting on social media so im not sure if that's the reason he is not anymore responding.

Why is a guy friend too emotionally attach with me?
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