When someone converts or returns to the Church, God often showers them with consolations and warm fuzzy feelings in order to help them along the path (think dog training and treats for rewards). Eventually, God will start taking away these consolations and it will feel like God has abandoned you. Assuming one hasn’t committed a mortal sin, God hasn’t left (though, God is still there if one commits a mortal sin. The relationship is severed, though), and He is testing you to see if you seek Him purely for Him, or if you seek warm fuzzies.
This is important for people to know. I have seen converts completely leave the Church (usually become Muslim) once the honeymoon phase is over because they equate God with warm fuzzies. If the warm fuzzies are gone, so must God be, and they will keep looking for warm fuzzies until they have to make them artificially (think Pentecostals, Evangelical Christians, certain groups of Catholics)