How to know if codependent or just supportive?

For context, this guy friend and I had a history of being dependent on each other. There was a time he avoided me for a month because he said he was getting addicted to always running to me to vent or to ask for help.

Anyway, boundaries were not clear back then and we also worked together for sometime which added to the daily talks. He had a failed relationship with someone back then which even added to the drama and the frequent sessions of venting.

There was a time he responds late and hardly talks. Then i also frequently deactivated my social media because of life happening.

Recently though, we reconnected because why not? He has always been close to me so i shoot him a message just to check and surprisingly he came back fast.

The problem is I'm beginning to notice that indeed he has some issues. To be fair, I've been asking him help as well as my health is not that good and he had the same sickness as I have currently so he has a lot to offer. But, what I'm worried about is that our help to each other seems to be in all aspects. He goes to me for help for work ideas as he said he is needing a part time job again. Then previously he vented last December because he said no one else understands him.

When I also asked help from him for my health, he was very helpful which im truly grateful for but
I'm afraid we are going back to something that might be too dependent if you will. Do you think we are just supportive or codependent? We spend hours sometimes just messaging each other

How to know if codependent or just supportive?
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