I'm an atheist, but I want to believe. As of this moment, I haven't had any compelling reason to believe a god exists, can someone help me?
MY DEAR BROTHER,
If you TRULY desire to believe, God, in reality, is the only One who can facilitate your attaining that most worthy of all goals. In all actuality, there is nothing another human being can say which will magically change your opinion from atheist to believer. i am sure you have heard it all before and should realize that this is true. Only God can effect the transformation you state that you are seeking.
That being said, however, it is possible to provide suggestions that will facilitate the working of the Holy Spirit in effecting your conversion. The main one is that you
SET ASIDE ALL YOUR PREVIOUS BELIEFS AND PREJUDICES (Yes, although hard, this can be done) and read through the New Testament slowly, prayerfully (asking God to help you TRULY understand what you are reading and to put aside all prejudices from the past which might color that TRUE understanding), and with an open heart and mind. The New Testament is approximately 275 pages in most Bibles--about the length of an average "best seller" and this should not be a problem, probably take a week.
Pay particular attention to the Gospels--Matthew, Mark, Luke, and John--as this is the heart of God's communication to us--the "Good News."
After finishing the New Testament, spent some time meditating upon what you have read and considering whether this is something you find desirable and TRULY wish to believe in and surrender your life to.
If the answer to the above is "Yes", read the New Testament through again, asking God to imprint what you are reading on your Heart and to give you trust and faith in the fact that what you are reading is His Truth.
When you have finished, ask God what the next step is and solicit His aid, support, and guidance in taking the next step--whatever He deems best for you as far as your spiritual growth is concerned. (For many, this might include reading some basic Christian apologetics such as MERE CHRISTIANITY by C.S. Lewis, ORTHODOXY by G. K. (Gilbert Keith) Chesterton, or something similar.
May our Lord guide you and bless your search for the Truth with success!

ABBA'S fool,
ephraim