We usually feel resentful when we get a feeling that we are being bullied or being taken granted for. It may also be a sign of being pushed beyond our limits by the situation making us feel guilty (wanting to be a good friend) This discomfort is a cue that someone is crossing their boundary with you.Read more
Be careful of your thoughts. Catch and nip the negative thoughts in bud. If you find it hard maybe because you grew up in a place which had either constant chaos or negativity, practice saying positive affirmations to yourself.