First, you need to understand – it is better to be lonely than in a relationship with the wrong person. I know it hurts and I know you miss him. The man that I loved more than life recently broke up with me (after an on-again off-again relationship of a year). I still hurt, but I know that he lied to me and he could never be trusted again. He and I were together everyday – emails, phones calls, poems, etc… (he was very convincing). All of the stuff that people in love do – but I was the only one in love. He was just lying.
If your Ex had really been in love with you – he would have wanted to make you happy (i.e. come and pick you up). Think about how you probably felt for him – you probably wanted to do things for him to make him happy – correct? When you love someone – his or her happiness contributes to your happiness. But you must not let it override your happiness.
I understand your loneliness. I am lonely too. I have tried dating – but I am not ready yet or I haven't met the right person. I have done the online dating thing and get about 100+ emails a week. But quality is much more important than quantity. Please don't rush yourself or you will find yourself in a worse place in the future. I miss my Ex too – but you have to not always think about the "good things". Be realistic and realize the bad things he did too.
Use this alone time to focus on yourself and fall in love with yourself again. And tell yourself – that you deserve someone who will treat you like a princess. If you don't take the time you need to face this, deal with it, and really let go – you never will. You must face it or it will come back to haunt you.