Uraraka and Deku do get together in the manga. It happens as their friendship deepens and they face various challenges together, leading to a romantic connection.
The exploration of their insecurities is a theme as well. Deku might worry about being a worthy hero for Uraraka, and Uraraka could be insecure about not being strong enough compared to Deku. Fanfics often deal with how they overcome these insecurities and grow closer as a result.
One great Deku x Uraraka fanfic is 'A Blossoming Bond'. It beautifully captures their relationship development from classmates to something more. The author does a great job of showing how Uraraka's admiration for Deku grows over time and how Deku starts to see her in a different light. Another one is 'Love in the Hero Academia' which focuses on their adventures together and how their feelings for each other are tested during difficult situations.