He kissed her passionately. He kissed him passionately. – a change of pronoun means a change of storyline !!
Here is a résumé of the pronouns in English which might help you to sort out your confusions :
A teacher’s website that I found makes it all very clear. you can visit by clicking HERE.
To practise your choices of pronouns, try these exercises ;
A fun and easy game but that will make you revise : http://www.englishexercises.org/makeagame/viewgame.asp?id=4017
The rules (this is a bit hard-core !!) http://www.esldesk.com/grammar/pronouns
Myself / Yourself etc are called REFLEXIVE Pronouns. Try this activity http://a4esl.org/q/j/tm/fb-reflexive.html
A TWENTY Questions activity : http://www.myenglishpages.com/site_php_files/grammar-exercise-object-pronouns.php#.Uv9Gufl5P90