Can anyone explain why this fish was so friendly? Garbicz, Poland

We were at the Kręcko lake at a festival in garbicz poland, when this little fish swam up to us and wouldnt leave. we didnt save him or anything to make him like us, we even joked that this little guy seemed to have no survival skills due to just being so trusting. it was really cute, he stayed by our side even when i removed my hands. he also seemed to ‚dive up‘ to get some fresh air??? what kind of fish is this? and is this normal wild fish behavior? he just kept looking and blubbering like me, which was really cute(made me feel a bit like a disney princess lol), kinda like he was trying to tell me something. hope this is the right comm for this, im genuinely very curious :) thanks in advance