Hola Brett

Yes, you can! 

You can use the subject pronouns (yo, tú, él, nosotros, vosotros, ellos) followed by "mismo/-a/-os/-as meaning "myself", "yourself", etc.

Mismo will have to agree with gender and number though, in this case:

For example:

"Voy a decírselo yo mismo" (I am going to tell him myself--> if speaker is a man)

"Voy a decírselo yo misma" (I am going to tell him myself--> if speaker is a woman)

"Vamos a decírselo nosotros mismos" (We are going to tell him ourselves)--> if the speakers are masculine plural)

Etc

Noted for a new lesson soon.

Inma