What do he mean by not the right guy to catch feelings for?

I recently told a close friend my feelings for them and he texted me saying "I'm sorry I don't think I'm the right guy to be catching feelings for" I just want to know what does it mean when a guy tells you he isn't the right guy for you I feel like I'm grasping for the right answer but I don't know I need help I'm so dumb
What do he mean by not the right guy to catch feelings for?
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