First of all, he had a "girlfriend" in another country.  That should tell you something right there. He tells you that things have changed between him and her, and that you are the only person in his life.   Unfortunately, he tells this to all of his girl-friends, potential girl-friends, girl-friend at the moment, etc.,  After reading your post, it certainly does not sound as if you are the only person in this man's life. If you know for certain that he talks to many girls on-line and on the phone, why have you gotten pretty serious with him?  If you are the "only person" in his life, then why is he talking to all of these other women and/or involved with them in any way in the first, second or third place?  Think about it -- If he IS serious about a committed relationship with you, and you only, why is he talking and flirting and very possibly (sexually) involved with so many other women?  He even has plans to go visit one of them for a few days?  Really?  --  Hmmm --  Why?  To get to know her better?  -- To spend time with her?  --- (Please Notice that while he is doing this, that he is not spending this time with you) -- And, if he is spending time with her, he is ultimately becoming "To Involved" with her -- so that kind of leaves you out of the picture here.  --And you are sitll serious with this guy?  --What do you think he is planning on with you?  --A future?  He tells you -- "You just need to trust him?" Why? --To give him time to decide if you are the one for him by going out with or becoming involved with other Women? Won't happen soon.  You said that the bottom line, is, "I don't trust him!"  --  "So, Why are you still with him then?"  -- Guess What?  I don't trust him either.  Sorry, Honey, This guy is not a keeper.  You deserve a lot better.