Never good enough

I have never used one of these sites because I feel its silly to put your problems out there but honestly I cant keep everything in anymore. I am so depressed about my relationship, I know that I have strong feelings for my girlfriend but she constantly insults me about things that I do. For example I accidentally broke a coffee cup and of course it belonged to her dad that passed away about 5 years ago and she went on to say that I always break things that matter to her like it was on purpose or something. About 10 minutes later after feeling bad that I broke the mug and after apologizing numerous time I continued to say I was sorry for breaking it and she then says that if we ever have a kid that she would not let me hold it without a harness and having it strapped to me because I am just going to drop it on its head. Plus I must say that I never feel like I am good enough for her cause she is almost always on social networking tweeting something and getting all the attention so she feels good about herself when I always tell her that I love her and she is so beautiful. I just don't know what to do with myself, I mean I have strong feelings for her and do really love her but I am constantly insulted by things like I am going to drop a baby or that she needs a megaphone cause I cant hear her. Plus a lot when we are talking to each other and I cant seem to articulate myself and say something in a certain way she will make sure I know that what I said made no sense and give me nothing but looks like what the hell. I am just so beaten down by everything that I honestly am depressed and am just going through the motions sometimes

Ok...if my partner broke my fathers cup I too would be pretty mad so her actions there are justified to a certain extent in that scenario but not with her other behaviour she throws towards you ie insults. Have you tried talking to her and letting her know how this makes you feel? If you havnt then maybe that would be a starting point. If she continues with this demoralising behaviour maybe you need to give the relationship a break. This may make her realise her mistakes in how she has treated you so far and that some respect is needed.Sometimes we all take our partners for granted and just need to be given a wake up call. Giving her 'time out' may just be the solution.