Hey,

I'd try not to worry so much about it... people tend to be attracted to a similar type of person, but that doesn't mean he doesn't love you. Remember that your bf is with you now, and that's his choice. If he didn't want to be with you, he wouldn't be.

As to saying the same kinds of things to his ex etc, just bear in mind that communication of feelings can be difficult for many guys to vocalise... I think it's more how he treats you and makes you feel that will show his love rather than written messages.

Hope this helped a bit