My dog is not aggressive. She is anxious and reactive toward certain dogs, but it's more of a fear-based reactivity. She can walk by some dogs just fine and not even flinch. She lives with two cats she's terrified of. If we're sitting outside and a dog comes by, she'll jump into my lap shaking in fear. Yes, at some point it would be nice to be able to introduce her to my friends' dogs. But if we can't, we can't. That's not my goal in walking her. I like walking my dog. She likes being walked. We both look forward to it. She's fine 95% of the time. 5% of the time she gets nervous/anxious and tenses up, and I don't want to make a small problem worse by letting her into a bad situation.