Quote:
Why can't I do this? Is this so hard, that I cant open a girl who seems to want to talk to me?
I think the problem possibly lies in being too outcome-dependant, putting too much pressure on yourself, instead of starting from a fundamental level and working your way up. If opening feels really difficult, like there's some kind if intangible barrier (despite being physically possible to accomplish), you need to find LEVERAGE to START taking the necessary BABY STEPS towards your goals.
Even after all these years and having reaching a pretty competent level, sometimes I will even shy away from doing some approaches (then regretting it). However! I have become increasingly self-aware to develop and monitor a fine-tuned system to recognise how I feel, why I feel it, what my state is reflecting in terms of my actions (not just whether I succeed or not), and the best course of action to get back into the best state in the moment (for maximum leverage).
Hence more good days than bad days, where I will be flowing/unstifled and opening with greater ease, with a lot of experience to back it up - the familiarity of being comfortable with various cold approach situations, instead of a strange and unknown reality. You're freezing because you're probably trying to accomplish too much, possibly hoping to avoid rejection (looking bad) and make everything go perfect (nothing is perfect), which causes your brain to malfunction and shut down.
In practical terms, I would suggest taking your mind off pick-up specifically and focus on becoming a social and confident person in general - banter with store people, break social convention in different ways (without feeling weird or judged), ask normal questions (ie. ask for directions) from anyone you don't know (strangers), getting any social experience under your belt and "testing" to see how you feel, and your willingness to act in these low-pressure situations (where your ego cannot be affected as much).
Then start talking to those you're actually attracted to, erring on the side of indirect for further leverage to create the necessary experience interacting with women. Who's going to blow you out for asking where the nearest coffee shop is? No one. Are you trying to close these people from the get-go? No. Like I mentioned several times about leverage, just do whatever you can to get in, prove that it's okay and you feel better about it (from increasing exposure and willingness that go hand-in-hand), and you should naturally start to open up more. Which means confidence in expressing your intent, being comfortable with the tension that exists between men and women, especially the boldness of cold approach in day-game. Set the criteria of success low, be pro-active, reward yourself for small victories (especially since most people won't ever start or ever be good at DG) and the victories will only get better over time.