I know there are topics about this, but for the last month or so, I've been getting logged out anytime I leave the site or after I make a post. Now, I can't even log in. It's definitely an issue with my computer, since I'm on my girlfriend's computer right now and have no issues (I was even already logged in upon coming here, despite not coming here on this computer for two weeks).

I've read the various suggestions to fixing this (i.e. clearing cookies), but none of them have worked for me. Now I can't even sign in on my computer. Anyone have an idea of what it may be? Thanks.

If you cannot log in, perhaps the password you're entering is incorrect. Try testing it a few different browsers - maybe one browser just has high restrictions on cookies.