Is myself a pronoun

Yes. the Word 'myself' is a pronoun.

The pronoun 'myself' is a reflexive or an intensive pronoun.

The reflexive / intensive pronouns are: myself, yourself, himself, herself, itself, ourselves, yourselves, themselves.

A reflexive pronoun is a Word that 'reflects' back to its antecedent.

example: When I got home I made myself a sandwich.

An intensive pronoun is a Word that emphasizes its antecedent.

example: When I got home I made the Sandwiches myself.