There are already so many good replies to your situation on here. I feel it's almost unnecessary to add anything, but one thing I do see that I haven't really heard mentioned yet, is your faithfulness. I just want to encourage you, in saying that you're doing better than most. Many "Christians" aren't setting aside a time to talk to their Creator. You're setting aside time every day. Keep on going!
Even when you feel all talked out, and feel you have nothing to say just have faith that God is working behind the scenes, and bends His ear down to you every time you go to Him in prayer. Every time you pray sincerely, no matter how lengthy or short, know your prayers are rising up as a sweet fragrance to the Father.
I don't know you personally, but I'm believing for the Lord to revitalize your time of communion with Him. He is a faithful God, and will honor your sincerity to meet Him and to strengthen your prayer time. I've knelt down to pray many times at a altar thinking God, what am I even doing? With no words on my heart to say, I would just thank Him for being gracious to me.
All I can say is remain faithful, and trust Him. Keep praying, and letting your roots grow deeper in Him.
Praying for you! <3