My wife spends more time with my kids than me and hence my kids are closer to her. They share everything with her but not me. This hurts me at times and I feel that they are drifting away from me. Please suggest me how do I avoid this.

It is not correct way to think that kids are more favorable to their mom. Father need to connect each time to kids wherein needed. so playing, study are two most common topics to connect with kids. Pls try to involve with them via two topics.