Sex is a big part of a relationship. Even though it is meaning of love, it shouldn't be the breaking point of a relationship.
When you love someone you want to be with them no matter what. Some people break up with people because the sex isn't good. If you are still searching for love and only found chemistry in the bedroom then there is your problem.
Don't jump into the sack with any guy because you think it will make him love you. Instead get to know him as a person and see how much you click. Go to the movies and hang out. Try focusing on his good qualities and how he treats you. Then when the time is right you can sleep with him.
If you meet a guy whom you like don't make it be all about sex. True love and good guys are hard to come by. So when you find that special someone don't let something fake like sex get in the way. If you do then you will be wasting your time trying to find it and get discouraged. You might not get a second chance with that special someone. Love is out there so take things slow and embrace it while you have it.