Don't be caught unaware, don't cry later, that you have been cheated on. A lot of relationship would have been better today if they had noticed and acted on all the pointers am about to list out below. Without much ado, let's highlight them.
1. His contacts: 
If 80% of his phone contacts are females, and it's no way related to business, then am sorry for you, be careful. His social media contacts aswell,  his bbm, twitter, facebook, whatsapp contacts are mostly females , my sister you need to pray, else.
2. His friends: 
my sister, if most of your boy friend's friends go clubbing, womanize, smoke and drinks and all he tells you they are just my friends, we are different. My friend, there is fire on the mountain ( in ASA's voice).

3. His Hobbies. 
This might be a little bit controversial but it's a pointer. The truth is having sex is also a hobby which he will never tell you. Now here is it, anytime he is free, less busy or maybe in town , he wants you to come over, probably sleep over too, and he has consciously or unconsciously told you how he can't go more than 2 weeks without having sex, sisi mi (you remember that Craig David 'am walking away'). My sister, also note this, he doesn't drink, he doesn't smoke, he doesn't like parties, he doesn't do sports  most especially he doesn't like football then what does he like? Your guess is as good as mine.
4. Selfish. 
If all he does is for his own satisfaction or gain. My sister that D-prince 'You are On Your Own O', is your case. Eg, you told him no sex coz you are on your period or probably not in the mood, then he suddenly becomes reserved and moody, he might even tell you, why don't you tell him before coming. He is at his best when you are with him or when he is expecting you (am sure you know why), but immediately you leave, he is like 'to the next'.. my sister stop being a MUMU it's 2016.

I wonder where the rest are

5. RICH AND HANDSOME. 
(please take note of the order) , Am not saying you should go and date someone that is broke and ugly, but all those things you admire (love)  in him especially if he has a GOOD car (not 1990- 2005 models o) .
Other girls are desperate to have him too. So my sister what is that edge you have that those girls don't have. If you are thinking about that your great body assets and the great sex you give him, my sister you have been jonzed .. (coz olosho will do a better job or what makes you think you have the wife material he is searching for?) .
6. He lives alone. 
Here is another pointer, (not all though but definitely majority ) , if he lives alone and not with any friend and family member, my sister in (Patiece Jonathan's voice ) 'Be careful'.Many have gone through that pact aswell.
Note. some masturbates  and are porn addict aswell . 
Abeg no be everyone oh, (at least I know of seun , and lalasticlala * what if na girl sef* ?)

If he doesn't get angry at all for your bad behaviour

7.Nicknames :
Have you ever wondered why his friends or neighbors call him that name. Eg, you went to his house, while he was seeing you off, his friends greeted him and you hear names like Ekun (Lion), okunrin mewa (10 men),  Ikoko (wolf) , bebo (pvssy breaker) , Pele, Maradona (or any sport player) , Strong man.. ETC... 
What about his moniker on Nairaland , BBM, twitter ID's and all his social accounts... Eg, obontami (he should tell us the meaning), pvssylord, KingCum, skirtchazers ETC. If after noticing all this you still stay, then we know your plan.
8. Fashion Idol.
He knows about all the latest fashion trends and those in vogue. He knows the prices of all ladies wigs (name them: Peruvian, Italian to Brazilian)  and accessories.
He is fashion conscious and always good looking, latest cologne in his cabinet, expensive clothes, phones  and wrist watches (they always flaunt it as well). Yorubas always call them 'faworaja' (Gold diggers). Eg. You are in a party, and all he does all through  the party is trying to show off by checking the time on his wristwatch, flaunting his car key, spraying money, drinking the most expensive wine or champagne. Before I forget, they are sweet talkers too, they can promise you banana island and the world bank. (my sister please gbera coz he is like aja 1 ton bo leyin). *am sorry can't intepret that*.

9. Always Broke.
The reason is not far fetch. He earn a good salary but before the end of the month, he is always broke. He doesn't have any form of savings whatsoever.. He believes in good luck. He is also good at emotional blackmail. Immediately he receives alert, he has forgotten about the previous 15 days of hunger. I will simply say they don't RONU (think)..
10. Spiritually Handicapped. 
Guys in these categories live there lives like paper or nylon, anywhere the wind blows them is where they go. If he attends church he is more like a spectator, if he goes to mosque, is to go look the girl with the biggest behind. He doesn't think anything being futuristic but immediate goals, which my sister, you are part of the goal. Though it takes a lady with spiritual understanding aswell to know this type of guys coz dog only follow bitch.

If after reading this article /post and you can attribute at least 4-5 characteristics to your boyfriend or fiance/fiancee (am confused sef), or sadly your husband..All I can tell you is *in buchi's voice*..'it is well, it is well with my soul today'.
Open to criticism and corrections. Thanks.