you don't HAVE to forgive.....if you don't feel, you don't FEEL it. and you may NEVER feel it......and that is ok. for-give means you GIVE something of yourself - a hurt, a resentment, an unmet expectation - and it must be given freely FOR a purpose. and if we are not ready to give those things up? that is our RIGHT.
however, those hurts and resentments we hold on to, gain power, as we bring a PAST pain into our PRESENT. and they continue to hurt us until we decide to LET THEM GO.