Tip #1: Always look beautiful
We all know how men love to see beautiful women. They are first attracted to women's physical features before their personality. Because of this, you should somehow look good, if not best. If you are thinking of the easiest way on how to keep a guy interested, then this is definitely for you.
Tip #2: Avoid being too available
Letting him know that you are always on call whenever he needs you will make him take you for granted. In this case, saying yes all the time is a terrible thing if you want to keep the fire burning. If he calls, make it a short talk. And if he asks for your whereabouts, just give him little details. Make him wonder where you are, what you're up to, and who you are with. This will certainly keep his interest.
Tip #3: Show a different side of you
Men love fresh and new things. If he sees you riding on a skateboard or playing guitar - which he has never seen you doing before, he will surely be on a state of shock, but of course, in a good way. Women doing many different unusual things are somewhat appealing. How to keep a guy interested is like learning the basics of mathematics, knowing plus and minus.
Tip #4: Be unpredictable
Guys often think that with a month old relationship, they already know everything about their partner. Make them realize that they are wrong. If today you love meat, make tomorrow a vegetable day. This would perhaps be a good way to keep his interest. He will wonder what is on your mind so make it an endless string of surprises.
Tip #5: Keep him waiting
Making him wait a little longer will piss him off. However, it will also strengthen their desire to be with you. It will make you seem like a challenge. If he is already at your house, always ask for another minute. But if you do, make sure that you will look stunning and glowing. Make his jaw drop and make him speechless in awe. As mentioned earlier, the simplest way on how to keep a guy interested is to put some effort on your appearance.