In the manga, Deku stays at UA. His journey is centered around his experiences and development within the institution. There are no plot points where he leaves UA permanently.
Deku remains a part of UA in the manga. His journey and growth are centered around the institution and its associated challenges and opportunities. There's no indication of him leaving.
Well, in this type of fanfic, it may start with Deku and Uraraka realizing their feelings for each other which had been budding during their time at UA. The story could then show how they start to date secretly, trying to balance their hero training and their new relationship. There might be cute moments like them sharing their dreams and fears, and also some tense moments when they face villains together and have to protect each other, which in turn strengthens their bond of love.
He might cry a lot. Deku is very emotional, and being cheated on would be a very painful experience for him. He could also get angry, which is rare for him, but this situation would be so unjust that he might not be able to hold it in. He'd probably start to question his self - worth too, thinking that there was something wrong with him that made his partner cheat.
You can try searching for it directly on Wattpad. Use the search bar and type in the exact title 'deku and uraraka love after ua wattpad fanfic'. If it's a popular fanfic, it should show up in the search results.
In fanfiction, if Deku gets kidnapped, his friends from U.A. High would likely launch a rescue mission. Bakugo might be especially determined, as much as he tries to hide his concern. They would use their quirks in creative ways to track Deku down.
There's also 'Injured and Alone'. In this fanfiction, Deku gets hurt while on a solo mission. It delves deep into his thoughts as he tries to survive in a dangerous situation, all while being severely injured. It's a great read for those who like character - centric stories when the character is in a tough spot.
Well, in the fanfiction, Deku might get a new look that changes how others perceive him. Maybe his friends at U.A. High are really surprised by his new haircut and it could lead to some funny or heartwarming interactions.