People have been so used to violating the boundaries of others that they don't understand the word No. No means no, doesn't pertain only to the purview of sex and physical violation. There's an emotional space, a mental space, a spiritual space and if you're pushing your way into someone else's territory... without their permission, even after they clearly said that this move of yours was not appreciated... you my friend, are a trespasser. A criminal, an abuser, a violater. You are entering a space that's not yours. Claiming someone's time and energy that they don't wish to spend on you. It exhibits lack of respect and self respect. So how do you understand if you are welcome or not? It's simple, very simple... Ask. And accept the answer. Don't try to manipulate it, twist it or read between the lines. If someone is anything but enthusiastic, about a certain proposal of yours... it might be them giving into relentless persuasion, guilt trips or anything else... but it clearly isn't consent.