Hello with respect for all the advice!

I have been successfully picking up girls for quite some time now, but for some reason, which I'm lately struggling to figure out, I can't hook up with them in a LTR. I love interacting with women wherever and face no major problems starting a conversation or get it going and closing.

In this period I'm basically trying to determine what I'm doing wrong with my interaction after successfully closing or 2nd dating her and I hope that I'll share with you interesting ideas and lines that have worked for me and will also help others getting till there!