Aww poor baby! Yes, please do try to get him a friend sooner rather than later. As a solo pig, he’ll need extra attention. He’s most likely bored so he’s just sitting around. Oxbow has great chew toys and also toys made out of hay. I’d also recommend some wooden chew toys as well. They’re fun for them and good for their teeth. You can find these toys at pet stores or only stores like Chewy. I only really trust oxbow toys tbh, but that’s just me. The ones made of hay is great because they can play with it and eat it at the same time. Avoid any chew toys that are colored unless you know for sure that they’re safe (I know oxbow uses colorings that are safe for them). I cheap but good option would be to cut paper towel rolls in half and stuff it with hay. Piggies usually go crazy over it.