He seems to be doing just fine. Active and swimming around. He almost ate another blood worm today but spit it out. I'm not sure if he is stressed but it's possible because one of them tried to nip at his fins when I first got him. I haven't seen them do it since then. I think it was just because the tetra was hungry..I don't really have a separate tank to put him in either. It's a 10 gallon heated tank with a filter with a lot of plants and hiding spots so I'm sure if he was stressed from the fish he'd be hiding and not swimming with them. At least that's what I'd think. Thanks for all of the support and help everyone. (:
I see him trying to eat (or successfully eating) some of the cucumber that I put in for the otocinclus catfish. I think he's also been eating some of the flakes that I feed to the tetras. I just wish he would eat food made specifically for bettas. I'm going to buy some new pellets soon and see if he likes those.