Hello darkslove
Welcome
There is obviously something wrong here.
After two years of living together as a couple, this deserves attention.
Whether he is cheating, missing his ex, or just finding that the relationship no longer suits him for some reason, he owes you an explanation. You deserve the truth, even if it is something you may not want to hear.
If he won't discuss it, thern perhaps you could write a note, explaining how you feel and why. You could show it to him and explain that you need to talk this whole thing over and ask him if he wants to work on your relationship, and perhaps go for relationship counselling ~ or if he feels that it is over.
You would need to make it clear that you need the truth, no matter how difficult it would be.
What do you think?
Would he react well to this?
Does he become angry?
Could it be that he has other worries on his mind and is feeling ill, worried, tired, or stressed?
That could explain the lack of love-making as much as his being interested in another woman.
But the texts do sound questionable, at least.
I hope that, between us, we can help you out a little!
Good luck!