Embarrassing, Embarrassed, Ashamed
い adjective
This is a single kanji with an い on the end, meaning you know it's probably an adjective. What's the adjective form of shame? It could be ashamed or even embarrassing.
はずかしい
When you're ashamed it's even worse when someone laughs at you: ha (は) ha ha!"
こんなことを言うのは恥ずかしいんですが、私は安物買いの銭失いみたいなところがあるんですよね。
I feel ashamed to say this, but I tend to waste money on cheap things.