Would you mind if I asked if you are currently in a relatively stable relationship?
If you are and you dream of a complete stranger kissing you passionately on the lips, it suggests to me that you feel as though you are not loved as much by your current boyfriend as you would like to be. In other words you are feeling particularly insecure within your existing relationship and this dream is being sent as cold comfort (a poor consolation for your boyfriend in real life, telling you that he loves you)
If on the other hand you are not presently within a relationship, then the dream is more likely to be an expression of your wishful thinking that you soon will be, combined with the fact that if the man comes from a completely different country that you are less likely to meet him face to face, and therefore risk him rejecting you.
Does this help?
eye_of_tiger
