Maneuvering a healthy relationship

When they say the healthy relationship following the toxic ones, end up being the hardest, God how true it is!

I have been in many toxic hard relationships, my last one mentally destroyed me, but I have found someone that amazes me more every single day. However learning how to maneuver through, not over think or worry about all I might be doing wrong, figuring out what he wants and needs, has me in tears on so many occasions! I have fallen in love with this man and I'm scared to death I'm gona screw this up. I want to tell him I'm in love with him but im so scared to he won't feel the same way or I will simply freak him out. I have no idea how to maneuver this relationship but I do know that I have never been happier.