Your emotions are always valid. In fact, one of the first things you learn taking university psychology, is that emotions are neither right nor wrong. but choices and actions can be right or wrong.
What may or may not be valid is your ACTIONS.
You have an emotional, moral, legal and unalienable right to choose whether or not others can touch you.
But what others do should not change how you feel about yourself.
As for this man, many people grow up in families where you hug and/or kiss on the cheek. This is normal to them. So the challenge here is how well YOU work with YOUR emotional responses. From what you say, it doesn't sound as if you have much mastery or skill at handling your emotions and may be somewhat a slave to your subconscious patterns.