@Ginkrap
if you wanted to post the full details of an exchange it might make it clearer what the reality is.
But as a general rule, your feelings are a guide as to what is right for you. If your partner is accusing you of undermining or manipulating him and your gut feeling is shock and confusion, something is certainly off in your relationship.
It sounds like your partner is not willing to engage authentically and equally, that your conversations with him feel like a power struggle. That can be a sign of abuse, or it can be a sign of toxicity. For me, the difference between the two is intent. If your partner is deliberately accusing you of things that don’t have a solid basis in reality, that’s abuse. If he is accusing you of things that don’t have a solid basis in reality out of his own paranoia, insecurity or poor thinking, that’s toxicity.
It can be very hard to tell the difference, but the larger point is that neither abuse or toxicity is healthy or sustainable in a relationship. If the relationship isn’t working for you and the way your partner is behaving s making you feel uncertain and anxious, then it’s time to get out. From another angle, it’s not healthy to stay in a relationship with someone who thinks poorly enough of you to accuse you of abuse.
Cavest: if several previous partners have accused you of being manipulative and undermining them, or have broken up with you because they don’t like the way you behave, its probably time to see a therapist about what you might be doing wrong in relationships.