Having been raised in an absolutely secular and unbelieving family and in a militant Anti-Theist society (the former USSR), I do, too, have a certain "Atheist streak" in myself - that is, I can very easily relate to those who completely, without doubt, "buy" the Atheist picture or model of the universe. I absolutely reject the notion that Atheists are necessarily selfish, immoral, unable to love, etc. Moreover, I, in all honesty, could never at all understand any of the so-called "philosophical arguments in favor of God" - IMHO, they are gibberish not worth of spending any time and effort to ponder on.
My personal faith is based on an entirely different thing: beauty. Just aesthetically speaking, to me, there is no beauty bigger, stronger, more majestic than the beauty of "the greatest story ever told," of the Gospel of Jesus Christ. And also, to me there is no beauty more complete and more "drawing" than the beauty of the Orthodox Church with Her Divine Liturgy, iconography, architecture. As long as all THIS exists, I am drawn to it. Whenever I enter an Orthodox church (any - Ukrainian, Greek, OCA (virtually so far), Antiochian, etc., does not matter), I feel what Paul Tillich used to call "the immediate presence of the Holy." I also feel this great need for a change in myself that would bring me even closer to this Holy, make me blend with It. This realization is strengthened on a daily basis when (and if) I maintain a certain routine of Orthopraxis in my life, or at least am trying to: pray the liturgical prayers of the Church in front of the Holy Icons in my home icon corner; keep the calendar fasts and feasts of the Church; meditate on my sins and sinful passions; give alms and do my share of stewardship. And it all culminates when I, unworthy as I am, partake in the mystical Supper of Christ, in the Holy Mystery of Eucharist. No "philosophy" is needed; it does not change anything. Simply participation, experience - that's what keeps me remaining a believer.
Sorry if this is not a comment that you were or are looking for; I know that to some people my "aesthetical" and experiential take on faith is unsatisfactory as it seems too irrational. But that's the only one I have, after quite a lot of years of "God-searching" (I am already 52).
May the Lord bless and keep you and illumine your path in life. Best wishes to you,