There are at least two answers to this question!
Jesus Christ is God. He is the Son of God and, 2,000 years ago, He came down to earth and lived among us for 33 years.
After He was crucified on the cross, He rose from the dead; He appeared to His disciples over a period of time and then He ascended into heaven.
Jesus now sits in heaven at the right hand of God the Father. Someday -- we know not when -- He will return to this earth to take His rightful place as King of Kings and Lord of Lords.
In addition to sitting at the right hand of God the Father, Jesus Christ is alive today in the world in the lives of all true believers, by the power of the Holy Spirit. The Bible talks about "Christ in us, the hope of glory." So Jesus Christ is alive in the world today in you -- and in me -- if we are Christians. He lives in us spiritually!