Concern yourself with being you. It takes time to adjust after any break-up. That is the best time to see yourself in the context of living a life. What you want ti do/be not a relationship but as your self.

The relationship was my first love and I felt very content in it and I didn't really think there was much wrong. Truthfully there was nothing amazing about me to begin with, I am very vanilla and before I met my ex, I had a slight negative look on life but I was content with life but she brightened up my life completely, I didn't need something to 'fill up the void' when I met her.

(By the way, I was in a relationship with a girl, not a boy.)

One month isn't a very long time. Let yourself grieve a little longer about losing your relationship. Eventually you'll see things more positively and be ready to imagine a relationship working out.

For starters, taking a month off after 4 years isn't enough. I took a year and a half after a 5 year relationship, and we ended it on very good terms and are still really great friends.

Take your time. There is no rush to get back into a relationship and if you are just dating to be in a relationship then that doesn't help either.

I'm a little curious. Did any part of the relationship fulfill you? Were you happy with yourself before you got into the relationship, or was that why you got into the relationship?

Take time for yourself, to get back in touch with yourself and to remember what is great about you, what is it about you that guys should find amazing in you. When you've gotten that back then you might also be ready to find guys who are worth being with and that you won't spend time wondering when they're gonna dump you.