To be abandoned, you have to be part of a couple or a family or group. This man doesn't know you yet, you're not any of those things yet. You're tentatively finding out about each other to see if longer term you will be one of those things. What you've experienced with this man isn't abandonment. He hasn't left you because he's not with you, yet.
Imagine it from the other side, Memory, you meet a man that you think you will like and it all seems nice so you start to get to know each other and then you find little aspects of his behaviour that grate a bit with you but you ignore them. Then ongoing niggles of either these or new behaviours and you start to think a) that he's nice enough but it's not going anywhere and/or b) how to start distancing.
Imagine your annoyance when this man isn't picking up on your cues that it's 'thanks but no thanks' and still maintains contact, like a limpet. You'd be a bit peeved, wouldn't you? If you wanted to widen your net a bit, maybe have seen somebody else who looks a better fit? But you still have this man and he's continuing to be there. Instead of seeing and treating him as the decent person that he is (and he is, despite annoying habits), you start to perceive him as a 'block', somebody who is actively preventing you from being free to live your life and maybe find somebody else.
At this point, you, I imagine, would say to this man, "Look, I've really enjoyed meeting with you, being with you, but this isn't working for me so it's time to say goodbye". You'd do that because it's the decent thing to do but other people don't hold the same values so they duck and dive and eventually just stop contacting the other person.
What I'm saying, Memory is that for you, you see what this man is doing is a rejection of you, but really it isn't. He doesn't know enough about you to reject you because he doesn't have you yet. His feelings haven't developed at the same pace - or at all - and you're just not on the same page now. It's nobody's fault it's just the perils of dating.
You say that you've known him for months but that being the case, he - for whatever reason - has just not engaged with you and doesn't want the same things that you do.
You said in your earlier posts that when you are not with a man you are a strong woman. You didn't sound scare or alone in that post; its only when you talk about this man and his dismissive 'take it or leave it' behaviour towards you that you sound unsure and sad. What will it take for you to see that behaviour for what it is and push it away from you?