1. You give each other the silent treatment
Fighting and bickering are expected in a relationship, but when it leads to stonewalling each other afterwards, it doesn't bode well for long-term success. If you're committed to your relationship, you should be willing to talk to each other in order to iron out your problems.
2. The sex is lacklustre
Sex, as well all know, is a natural desire. While some relationships are able to endure without sex, it's a key component to the majority of marriages. If the love has gone in the sack, it's more than likely left the relationship altogether.
3. You no longer have much in common
While there's an element of truth in the claim "opposites attract", your differences will eventually start to tell. You and your partner want to enjoy your time together, but if you're both into massively different things, this can become incredibly difficult.
4. Your careers come before the family
As we begin to focus more on our careers and the path that we are on, relationships can begin to suffer. If one of you is out at work for the majority of the day, the stay-at-home spouse will begin to resent the situation, leading to major issues.
5. You have contempt for each other
Belittling each other and treating each other with disdain are indicators that your relationship is beginning to disintegrate. While you won't always see eye-to-eye, you need to be able to respect one another and treat each other how you want to be treated.
6. You don't respect each other's "love language"
Understanding how your partner feels appreciated is crucial to long-term success in marriage. Although you may love your spouse, they may not feel loved if they have a different love language to you. Some people like things like spontaneous gifts, while others prefer verbal affirmations, loving touch or quality time together. Learn your partner's love language and make them feel appreciated.
7. You lie about your finances
No matter how you organise your finances (joint account, separate account etc...) you need to be honest with your spouse about how you're spending. You are both accountable for the family finances and if you're not transparent about where the money is going, it can be hard for your partner to trust you when it comes to buying a home or planning for retirement.
8. You never fight
A huge flaw in many relationships is a refusal to argue. Arguing is part of a healthy relationship and if you refuse to speak up when you feel like something is unjust, it will only lead to resentment and further problems. If this person is really your lover, you should be able to accept one another's comments without it destroying your matrimony.