You are using Unity, right? I don't know if you actually need specific libraries to make a dialogue system. I looked at these three tutorials on dialogue boxes to get me started. The first two are ~15 mins each:
- Unity RPG Tutorial #28 Dialogue Boxes
- How to make a Dialogue System in Unity
- Dialogue System and Interactions | Making a Simple RPG - Unity 5 Tutorial (Part 3) (longer so maybe not)
I wish you the best! I hope to play what you have since I know you've spent a lot of time on it already.