Hello MaryANNE, "Should I believe him or not ?" to believe someone not ( to believe to someone) You can also say : "Should I believe in him or not?" If you believe in someone or what they are doing, you have confidence in them and think that they will be successful. If your question is not grammatical ,then as Fede mentioned your question without details is incomplete. Please elaborate ;)

hi MaryANNE, first, in your question omit the preposition "to" or rather, replace it with "in": 'should I believe him or not?' / 'should I believe in him or not?' I guess you're the only one who can answer your own question but just to give you a piece of advice, it's better to wait for his action towards everything he said or promised... until then, you would arrive on believing him or not. :)

Believing in someone is not bad in itself. However, believing in someone despite your own feelings and judgement can be risky for you. If you have doubts, take some time to examine why this is so - perhaps something he said or did doesn't make sense, or alternately this situation reminds you of a past situation, and so you react this way. Try to make things clear and don't listen to him until you're sure (even if he does deserve your trust after all). Time will tell... in the meantime, look after yourself. ;)

Hello MaryAnne If you are the same person, who explained me the story... Don't believe in what he says to you... and you know why...

just believe in yourself...it will give you your answer{and ask yourself what you want exectly}