i believe that sucks,I mean it happens,it'll probably happen again ,if your not like 79 and you have to die tomorrow,but I certainly hope your not..
...what I used to do is get me few beers or vine,best friend,we used to take shitload of cassettes (funny music playing thingy from dark ages), hit some meadow,drink,drink ... then you cry,a lot,wanna kill yourself (thats the part where you need friend) ,probably call her all fucked up,cry some more and do something stupid.. you pass out.
next day you're too fucked to think about anything ..
well in any case .. i hope youll get better soon !
There's more to a relationship, and in your words love, than sex, you know. You rely on each other, you trust each other, and you would do anything for each other. Would you do the same for a fuckbuddy?
I was also going to say though, drinking won't solve it. Though I've always been single, I find that calm, logical thinking helps me if I'm down, though that probably won't work for everyone (or maybe no-one apart from me).