Very confused between two jobs. pleasee helpppp?

hello everyone

i am in a dillemma right now. i am looking for a part time job currently so i could study for my gmat. i went to a psychologist's office (an hour commute from my house ) for an admin assistant interview and didnt hear from her from a week. when i finally called her after a week to see the update she said she has found another better candidate and will move with her. she was offering $12/hour. now that same day, i went to a verizon cell phone store close to my house to apply and i got called the next day for $8 an hour. i said yes to the verizon store and the manager fired the person who i was supposed to replace and asked me to start in two weeks.

right after saying yes to the verizon store, i got a call back from the psychologist's office and she said she wants to hire me. i went to the 2nd interview and she liked me and offerred me the job.

now i am so confused i dont know what to dooo
i dont know if i should work with verizon or with the psychologist. the only reason i am thinking of not leaving verizon is because the store manager fired someone because of me and do you guys think it will be selfish of me to leave her?

P.S. i'll make the same amount of money working 28 hours at the psychologist as i would make working 40 hours at verizon.

Please help! please help me and tell me what you think i should do.
Thank youuu
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You must look after yourself, that is what the others would do if the situation were reverse. Take the job you really want. It sounds like working for the psychologist and making more money per hour is what is best for you. Put your feelings and heart aside and think with your brain. The Verizon job can easily be filled by someone else and you have not worked there very long so they do not have alot of time invested in training you. Its not your fault that someone got fired, this would have happened regardless if you got hired or not.
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Depends on the number of hours available. If you can make the same amount of money, take psych cause it would be less hours