Hello and welcome to the forum, I'm sorry to hear your parrotlet has passed on and left you lonely. It's amazing to see such small birds/creatures can have a huge impact on our lives as pets and companions.
So there are a few options for you if you want a bird a little larger then a budgie or a PP.
You could get a smaller love bird, they are fun and love to interact with their parront.
Then there is the linnie's or lineolated parakeets, these birds have become a huge hit with people lately. They are about the size of a budgie and are known to be big talkers that repeat sounds but they are quiet and have squeaky little voices! They eat a good variety of fresh foods and are kind of clownish as they enjoy hanging upside down from their cage and playing a lot. They like to interact with their parronts and are affectionate and enjoy hands on attention.
There are conures that are many different colors and breeds they are about the size of a cockatiel, they are social and enjoy interaction with their parront. They eat a healthy diet of fresh fruits and veggies as well as pellets and seeds, they love to play with toys of all types. They are a good bird to have in an apartment if you want a bird that doesn't scream and make too much noise they are also known to be good talkers.
There is also a kakariki parrots which are about the size of a cockatiel they have interesting voices that repeat sounds and they are talkers as well. I don't know much about these birds but they have become a favorite of parrot lovers all over the world.
If you want to see what these birds sound like I suggest you check the different breeds on Youtube and see what they are like and if you think they are the bird for you.
Good luck with your search for a new feathered friend.
I hope you get a new fid to make your lives happier soon.