You should go and first change your name..I guess your parents believed in Krishna and they named you after him..But I guess you need scientific evidence for everything... Even I don't believe in such stories..but if you don't know about something that does mean it doesn't exist. Knowledge of science and history for humans is like fraction of a percent of knowledge out there. We don't know anything more than 2000 yrs ago, just speculation and theories that keep changing. We still have not put our foot outside of moon..and that also only once.
There are more reasons to believe ramayna and its stories than just dump it as a myth..Our scientific community has not have enough resource funds and technology to prove its theories