Your spouse does not seem to be happy about you the way you are and is constantly either criticizing you or your looks or your activities. If you find yourself fighting a lot more with him / her then chances are that your spouse  subconsciously does not like you anymore and wants to leave you even though overtly he / she does not intend to. Your spouse now considers the new love interest as the epitome of perfection and you are now being unfavorably compared to the new person thus justifying your spouse’s new found hatred and contempt for you.
The fact that he is openly criticizing your looks or aspects about your life is not something that you should take lying down as such barbs and comments from those that we hold dearest to in our lives can cause irreparable harm to our psyche. You must not dismiss this as a new found quirk about your partner but rather realise that he / she may be having an extra marital affair and it is upto you to now take decisions to confront your spouse armed with proof or go on being treated like a doormat!
2. Your Spouse is Always Cleaning Up Or Has New Items 
Your spouse’s car always smells fresh and is devoid of any objects that may signal the fact that he is married and has children. If there is the possibility that your spouse might be going for romantic escapades in the car and because he wants to look perfect to his lover, he will in all probability try to remove any traces of his marital life such as the toys of kids flung around in the backseat or your gym shoes etc.
A new lover will always try to stake a claim to your spouse’s life by gifting him small items every now and then. Pay attention to new items that your spouse might be carrying on him such as pens, magazines, gadgets etc. Though seemingly innocuous, these items may have a more sordid story to tell! And it is in our opinion that you must pay attention to such small details in order to ensure that you are not taken to be a gullible fool by your spouse.
3. Your Spouse Is Suddenly Big on Gifting
Have you heard of the term guilty conscience? Well your spouse may just be suffering from that if he / she is cheating on you! Well, we are not saying that you dont deserve that gift! Of course you are entitled to gifts from your spouse every now, especially on special occasions which you must accept with alacrity. But if you have seen a surge in the number of gifts that are being bestowed upon you for no rhyme or reason and have noticed that the price of the gift is out of line with the occassion, then there is indeed cause for alarm. Your husband might have the feeling that he is compensating the bad feelings that his infidelity is generating within him by showering gifts upon you.  But if you are smart, you will wonder why and get deeper into his motivation.
4. Your Spouse Has Suddenly Become a Fitness Freak
Nothing wrong with realizing that one has become out of shape and taking steps to rectify that. And most men and women as they grow older and become more settled, decide to succumb to the fitness bug which can take the form of yoga, marathons, swimming, working out to the scores of new and exotic fitness options out there. But you must also look at the darker side of this fitness and obsession with preserving one’s beauty and youth. Think back to your own romantic life. Didn’t you take special efforts to look pleasing to members of the opposite sex? Didn’t you hit the gym or the jogging track for a little pre-date workout so that your skin glowed and your stomach seemed a little flatter.
 It is natural for humans to desire to look attractive for their partners because remember it all started with your looks (though some may argue) mostly. Most often in healthy marriages, the couple works out together and takes joy in motivating one another and ensuring that both partners stay happily attractive to each other. But if one partner is secretly wanting to do it all alone, there is room for worry. Who knows, your partner may be carrying on an affair with someone from his gym itself! Which is why he doesn’t want you to join his gym! Be aware of such signals all the time.
5. Your Spouse Has Suddenly Acquired New Tastes & Preferences
Your spouse has over the last few months suddenly become a different person altogether – someone you cant recognize anymore! For example, your wife who just couldn’t get music, music artists and different genres of music has now suddenly become an ardent Pearl Jam and Alternative Rock fan! Similarly your husband who was never an avid movie lover or hated anything other than whiskey has now taken a liking to Iranian cinema and fine wine!