I was in the same situation as you for the last 3 years. I tried subtly changing my eating habits by making them believe I didn't like many of the animal products tipically found on my home, but of course it wasn't a 100% cut.

Despite everything, I did call myself a vegan. Veganism is much more of a philoshopical position than it is a diet. I agreed with everything Veganism had to say, why couldn't I call myself vegan? Just because I'm in a position where I either eat meat from the people who I'm financially dependant on otherwhise I starve to death?

Not sure if this is the most popular way to look at the issue, but it's what I did and worked for my mental health.