How do you tell your partner that they will be losing you if they are to continue with their current character of taking you for granted and neglecting your needs but to focus on himself?

Where does this lead to when you're attached but you're leading and living as a single. Not to say that you're free to go clubbing or drinking or flirting. But the fact that you're alone and your partner is nowhere near you.

What am I fighting for? What's my fight?

The other day on the radio, they were discussing something similar.


What would you do if you suspect? 
It could bring the relationship to a halt when they think that there is no trust in the relationship or even that there is suspicion in the relationship if you would confront and ask them out right what more trapping.

But what would trigger the suspicion in the first place? Not to mention the actual act of cheating on your partner?