Give your man his own time and space. Let him have his time for his friends, sports, family, self, and God. The relationship will grow old quickly if you're always together. Give him time to miss you and you'll... See more see how he will love you more. If the guy is obsessed and just wants to be with you all the time, tell him you can't respect a "puppy" for long.
Do things differently anytime. Even if you're relationship is too long, there is always something fresh and new. Variety is the spice of life. Exciting in simple words?
Discover something you both like to do and enjoy it TWOgether. In the things which you have differences, compliment each other by learning about it. If you love someone, your effort to try will go a looooong way to understanding him later when you have disagreement.
Pray with holding hands. Sounds corny? Maybe, but its very powerful. If your boyfriend fears God, you don't need to worry that he will going to cheat on you, because he knows God sees everything he does in secret. Do the first move that before you part after a date, with hold hands and eyes closed, pray to God to bless you two. Believe me it's effective.