If you love something.. let it fly free... if it comes back it's yours.. if it doesn't it never was.... The thing is, he was and still is and always will be yours. His focus is on his own partner as yours would have been when younger. When you find your partner you tend to give less time to family...... more to the one you love. This is temporary usually, unless the parent(s) make a to do about it.... and a distance of varying degree ensues. I suggest you just let go... make an occasional phone call to ask how 'they' are and maybe ask if they are coming to visit in an encouraging way. Don't make the mistake of believing she has stolen him from you and treat her badly or reject her in any way. Show a real interest in her and she will not feel threatened... she will then encourage him to see you either on his own or together. Take it easy and don't be too upset... this is more about them and their life than you. Best wishes, Mike.