Does anyone of you ever experienced some difficulties in putting together a title page for a thesis? This seems super easy, but here I gave up... Any help or suggestions will be so greatly appreciated. I tried to create this following title page in latex, but constant errors just annoyed me.
\newcommand{\tbf}[1]{\text{\textbf{#1}}}
%title page
\thispagestyle{plain}
\centerline{Pretty Girls Secrets}.
\centerline{\textnormal{by}
\centerline{\textnormal{Pretty Girl Flirty}
\par\vspace*{.25\textheight}{\centering A thesis submitted in partial fulfillment of the requirements for the degree of}
\centerline{\textnormal{ Doctor of Philosophy }
\centerline{\textnormal{in}
\centerline{\textnormal{Flits Science}
\par\vspace*{.55\textheight}{\centering Department of Flirty Girls and Boys Science}
\centerline{\textnormal{ Flirt University}
\:\textcopyright Pretty Girl Flirty, 2015
Another issue with this: I have dots (..............)- where the examiners should put their signatures, but I would like to have straight lines instead of dots. Thanks. Sally.

