I have to say it again since it's one of the first, and worst, stumbling blocks for a lot of guys. I actually had a good laugh when I read your post because it reminded me of the first time I said "I really like you Amber, I think about you all the time, do you think we could go out to a movie together sometime?" which lead to a month of being played ending in confusion and frustration. Seems like ages ago.
Anyway, never tell a girl you like her or love her early on. When her emotional attraction to you is at a certain level and depth you can get away with saying it (meaning after being toegther for a year and she's still super attracted to you)... but it almost never increases her attraction for you. If her emotional state and attraction is below yours and you tell her you like or love her she will run for the f'in hills. (or agree and LJBF you) If she was really attracted to you she wouldn't have been in agreement.Ok, moving on...
I think most experienced guys in this forum can attest to the idea that going to a movie is a horrible first date idea.
1. You can't talk or communicate with her at all really = how are you going to increase her attraction for you?
2. There is no energy to the interaction
3. You want to fall alseep after getting out of along movie not go out on the town or do something fun.
I'm a firm believer in the idea that humans are better at DO'ing thatn NOT doing. And if given a list of "not to's do's" with a girl we end up running through a checklist before we make a move. Or at least I used to and that would trip up my interaction.
Instead of giving you a perspective on what not to do, try this perspective. It's one I adopted a while ago and has worked really well for me...
There is a specific set of traits and behaviors that women find universially attractive. So, why wouldn't you want to take those things and only work those into your interactions with girls instead of everything else that, say, might make them bored or not respond emotionally. Think of this as the foundation of your interaction.
1. Girls love stories that invoke some sort of emotion within them, so have a few good ones to tell.
2. Girls love hearing about other peoples drama, rock star scandals, mafia driven/drug dealing/coke slinging/drug busting craziness (from jerry springer, to talk radio, to local police logs), so talk about that stuff, it's interesting, and then what's behind it so you convey your understanding(important!)
3. Girls love interactions with energy that bring them to peak emotional states (amusement parks!)...now not the wierd new age voodoo type of energy...I mean real "I'm pumed and having fun!" energy.
So, say you go on a date and only focus on DOING those three things. What do you accomplish?
1. You're fun and interesting (bonus!)
2. She'll remember what you talked about because her emotional state was high
3. Since you were only really talking about stories and fun topics you remain a mystery to her
4. You convery that your smart talking about what's behind the drama you see in life (You know the score!)
Anyway, hope that helps. It's worked great for me.