We can’t be a new creation on our own, but by the power of the Holy Spirit who came into your heart when you truly accepted Jesus, you are. It is not something which will be heralded by angels or by some miraculous healing, but it is a transformation of your spirit. You become aligned with one of the Trinity and by His power you are a new creation!
The second question from above is not possible because unless God calls you spiritually and you respond by giving your heart and life to Jesus, you can’t and you won’t be His. You may go to church and be a deacon or a Gideon, you might even become a missionary overseas but you will be doing these things under your own power and not by the power of the Holy Spirit.
That being said, I do not mean that you aren’t a good person, but you can be a “fan” of Jesus and not a follower. By that I mean the same as someone who is a fan of a particular sport. You are a true fan but you don’t play professionally. You know about the sport or the person Jesus, you have heard and read many parts of the Bible, but until you let Him into your life and your heart and truly become a follower like His disciples were, you are just a fan and nothing more.
It is wonderful to be a fan of Jesus, but until you can say truthfully that you love Him and know Him from His word, that is all that you are. You are not a new creation because you don’t have Him in your heart! This is a hard truth that many in the church today have a problem with and many who have been in church and who have left also have a problem with it. Being a member of a church and attendance every time there is a function at the church doesn’t do anything for you spiritually anymore than being in a garage makes you a car!
Until you can ask Jesus into your life and your heart and live that way daily, not just on Sunday, you haven’t changed! Until God calls you to be that new creation and you answer that call by asking Jesus into your heart, you aren’t a new creation!
Oh, but when you do answer His call on your life, everything changes! Your life takes on a new meaning, your relationship with everyone becomes more meaningful, your whole character changes because you are not the same anymore! Your heart and your mind will begin to reflect the attitude and the person of Christ and everyone will know it, even if you don’t say anything about your decision.
God wants all of humanity to come to Him. Whether we choose to do so is our individual choice. It is not forced because love cannot be forced. He won’t make you love Him because that is not love. Choose Life from the Sustainer and the Creator of all life because when you do, you will be a new creation! All of the old habits won’t have the same hold on you, your friends will either like the “new you” or they won’t. Give Jesus a chance in your life and your heart because He is the longing that we have been searching for and didn’t know that He was it!