How do you say watashi mo tottemo ureshii desu in English?

I suspect the intended meaning of this sentence is "I am a lone wolf." However, as it stands, it is slightly grammatically incorrect; hitoribocchi ('solitude,' 'aloneness') is a noun and not a 'na' adjective.

There is a phrase that equates to the English 'lone wolf/loner.' It is "ippiki ookami.' Thus, you may say 'Watashi ha ippiki ookami desu.'