For you, your issue is that you think too much about what's going on, rather than just relaxing and enjoying the moments. What you should do now is do some calming things in order to slowly cultivate a calming mindset. The best thing you can do for yourself right now is to read a peaceful book, or maybe do some fun stuff, like maybe music, sports or something to get your mind off these insecurities/brick walls. If its something that happens subconsciously, then it's better for you to slowly but surely overcome it.
Progress can't be rushed, but if it can be rushed, then it's just skipping corners, and that's not the best way to do stuff.
I do know that you care a lot about Angel and that's good, but it's better to also remember that by allowing her to satisfy you, you are also going to make her happy too.
Just relax, enjoy the moment and try out new stuff you want to do. Remember that she probably wants to do it too.
Most of all, don't doubt. Believe. I think that your will and determination should be able to get you through the brick walls. You just gotta be stronger and more resolute than the negative emotions that hit you, wave after wave.