Potty training/Need friend?

I'm gone for a few hours a day at school and so are my roommates. Does he get lonely? Should I get a companion for NiNi? I feel so bad leaving him alone at home for any reason like going to school or the grocery store or when I go out to play. I feel so guilty leaving him by himself, he's only 3 months. He has tons of toys but to me it's not the same thing as having another warm-blooded person or thing to keep him company. Does he need a companion or am I worrying just too much?

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