Choosing to transition is a deeply personal choice. Some find it helpful to ask whether you feel that you currently embody and live as the gender identity you wish to live as. In answering that question, it is important to consider how much daily, persistent discomfort you experience by not embodying your gender. Many people who detransition do so not out of regret, but rather because they lack the social and economic support to do so safely and/or securely. 

Reasons for transitioning can include many things, from experiences of dysphoria to longing for a certain gender presentation. While for many, transitioning is an avenue to realizing their gender identity, you do not need to transition in order to be transgender. You may also view more on making this choice here.