<human>: Could you distill the essence of the text into 1-3 sentences?

I'm a 23 year old female who is relatively happy in life. I like my job, I love my family and friends, but I'm finding as the years go on, my relationships are starting to fail. I need to get over my insecurities and fast. 

I don't have a specific reason for why I act the way I do, I think to some degree I am just naturally closed/ guarded on certain issues. These issues are sometimes little things, sometimes big things, and I can't help but freak out when they arise. An example of something big would be my intimacy issues. I feel awkward when someone compliments me and can't handle being touched or someone being affectionate towards me. The little issue would be I hate people paying for anything for me (as little as a coffee!) I would rather go without then owe anybody anything.

I had a fight with my best friend yesterday, he means the absolute world to me and is my favourite person in the world. He got extremely frustrated at me that I wouldn't let him pay for something for me. I didn't know what to say back, I feel like this is just how I'm "wired." He claims I have some issues I need to deal with and that I need to get over my insecurities.

So I ask you reddit, how did you get over your issues/ insecurities.
<bot>: 23 year old female starting to see that the relationships in her life are starting to fail after realising she has issues but doesn't know why.