Should I see if he's interested in getting back together?

If he said he loved you and really meant it. A month is not a long enough time to forget about someone. It takes way longer to forget someone when you love them. It took my friend almost 6 months to even start to move on after she broke up with her boyfriend. If he is the type of guys that just says he loves you and doesn't know the true meaning behind that word than of course he could of moved on already. You just are sad you don't have no one to be there with you. You feel lonely. Your reason for breaking up with him is not that good a reason for not ready for a big commitment. That stuff you should bring up before you start dating because if you do it in the middle of a relationship you will just be playing with the persons feelings. If you are serious to be with him than talk to him about being back together and see what went wrong last time to fix it this time. Ask yourself all the questions if your ready for a commitment if you thing he is still too clingy before you date him again. The last thing you want to do is hurt his feelings again.

Well there is a really nice quote that I think you need to read

"When a man is rejected by the one he loves most, all he can do is run. Run and run until it stops hurting and he can find the one he will love the second best. Once he closes the book on that first girl, it's closed for good, but until he does there is a chance that she can still win her way back into his heart before it's too late."

So all you can do is try your best to win him back, give it your all, but expect to have to EARN the rights to his heart again. By dumping him, you broke his trust, so you need to earn that back. Again do your best to win him back if that's what you truly want and are ready for. If you have even the slightest doubt that you aren't ready, don't do it. If you are ready, do your best, you'll only have a little bit of time before he gets over you enough to where he cannot and will not ever love you again.

In a months time he could have easily gotten over his love for you especially if you broke up with him. I rejected an ex once who came back to me after only 2 weeks! If you want to get back with him and are sure that you actually want him then why not see if he wants to hook up again. If you are not absolutely sure that you have long term plans for him then leave him alone. No need to play around with his emotions.

He might still be in love with you, which forces him to avoid you. Its really painful to stay in contact or even see someone who broke up with you.
I am still in love with my ex, but I haven't talked to him in awhile. Because I'm afraid of being rejected again, or seeing that he has moved on or whatever. It just... hurts really bad. I feel safer with the "unknown". Your ex sounds like he is experiencing the same thing as I am.

If you truly love him, and are sure about wanting to be with him in the long run, then try getting back into his life slowly. Like, talk to him and see how he's doing.
By talking to him about ordinary stuff, you will be able to sense if he wants to get back, or if he still has feelings for you. You will see it in his eyes, and action. If he looks hurt when you approach him, then obviously he still loves you.