I really don't have best friends ocd ruins every friendship and I really feel alone and depressed

So, the anxiety is not you. Nor is it your fault. The same is true for OCD. It may be difficult for your friends to understand what you're going through, but it also sounds like they're not trying very hard. Life is more difficult when you have a psychological disorder - it's like having any other medical condition, and it takes time to learn how to handle it properly. If you're doing what you can right now to figure out how to live, then you're doing all that you can do.

Same here :(

I realize this is a sensitive question...so feel no pressure to answer...but in what ways does it ruin your friendships? Are your friends not understanding, or does OCD keep you from spending time with them?

I had this happen recently. I only got diagnosed last month, so before I had suspicion but I wasn’t sure. My friend was gross, like his room was dirty with stains and dirt inside and so was the inside of his car. And this triggered my contamination OCD a lot, but I was too judgmental making insensitive comments about him and his home. I should’ve been kinder and have not said anything, I know he should be cleaner, but there was never a need for me to be passive aggressive and insensitive about it. He was a really good friend, but I was an idiot. But yeah, OCD has ruined a lot of things for me, including friendships