People not meaning what they say

All my life I've struggled with people thinking we are much closer than we are and I think I know why; I simply mean what I say.

To give some examples, a few weeks ago I went to London for a trip. A coworker told me a friend of her's was there and he'd been to some amazing places. She said she was going to text him for the addresses and then send them to me. She never did. During this time, she also asked me if I could bring her a keychain as a souvenir. I said yes, they are only a pound. I came back and I gave her her keychain. She couldn't believe it. Months before, this same coworker had told me about her birthday party and that I should stop by. I said sure! I never got a text with the address or time of the birthday. When I was in London (it was a work trip) I met a girl there and she said she was going to give me a list of places I had to visit while in London. She never gave me this list.

I have countless examples of this. I've been let down again and again by people, yet I always go forward with my word. If I say "I'll help you on Monday", I make sure to text you on Monday to let you know I'm free if you want to discuss. And every time I do this, people are surprised. This wouldn't be a problem, but this makes people feel special. They think I'm being true to my word because of them, when in reality is because of me and because I made a promise. This has led people to think I like them more than I actually do, or that I view our relationship as something I don't.

I tend to think I have a superficial relationship with most people, but because of this they believe I am much closer to them and thus end up treating me as such. I don't like this because I don't want every relationship I have to have a deeper meaning. It get tricky when they are men because they think a romantic element's at play and it becomes awkward.

I am also tired of being let down by people, and I keep feeling like an idiot because I never learn and always expect them to deliver on their word. It makes me wonder if they never go forward with their word to anyone or if it's just me.