This favorite subject for Christians from all walks of life, Calvinism posits that God chooses us, therefore we can't possibly choose him. So choose your theology wisely.
From Wikipedia - "Irresistible grace," (the 4th in the 5 points of Calivinism) also called "efficacious grace", asserts that the saving grace of God is effectually applied to those whom he has determined to save (that is, the elect) and overcomes their resistance to obeying the call of the gospel, bringing them to a saving faith. This means that when God sovereignly purposes to save someone, that individual certainly will be saved. The doctrine holds that this purposeful influence of God's Holy Spirit cannot be resisted, but that the Holy Spirit, "graciously causes the elect sinner to cooperate, to believe, to repent, to come freely and willingly to Christ." This is not to deny the fact that the Spirit’s outward call (through the proclamation of the Gospel) can be, and often is, rejected by sinners; rather, it’s that inward call which cannot be rejected. In fact, every saved person can testify how, at some point in their life, they “felt overwhelmingly compelled” to believe in Christ, as if they “had no choice but to follow Him.” This is what is meant by the effectual calling of God.