I'm so sorry for your pain. He sounds like a very toxic person who uses people and has no ability to be empathetic.

In order for you to take good care of yourself, it is best to go total No Contact.

If it were me, I would send him an email or a text (keeping a copy) and tell him that I feel used and hurt and that I want no more contact at all with him. I would tell him to stay from me and my kid(s). That way, there will be proof if he tries to reach out to you.

Sporing events usually mean a lot of people will be there and that there will be lots of places to sit/stand. So it shouldn't be all that hard to avoid him there. I would also block him from social media, email, phone, etc.

It will be hard at first, but the longer you stay No Contact, the easier it will be and the more you will see more clearly that you deserve much better.

~healing hugs~

Ditto everything MyTrueColors said. Since you are hurt, it would be best not to attempt being friends. It doesn't mean you have to be rude, but you don't need to be best of buddies either. Take some time to over come this....and you will overcome this...then see if you can be friends. (((HUGS))))

He has already blocked me. I was posting a happy bday memory to a friend that just passed away. I accidentally posted missing you on his timeline as soon as I realized I did it I deleted it within seconds there was no way anyone could of seen it so he blocked me. He said he thought he was just blocking me from posting on his timeline BUT when I told him he unfriended me when he did that and he said he didn't know that would happen BUT he still hasn't unblocked me.

I just can't get out of my mind that maybe he wants a relationship but just not with me.

From you have posted, it seems that he is not into you anymore and being friends mean that he will look for you when he want to have sex. I am sorry to be blunt but it seems his action speak for himself.
The no contact is a very good approach to let go and move on. I am going through the same situation, am taking it day by day. I know it will heal especially when you realized that he is indeed a scumbag.

I'm very sorry you're hurting. I thought I read in one of your earlier posts that at the start you both agreed that you would have a casual relationship? If that's the case, I don't feel he misled you. Your feelings changed but his didn't. I'm guessing that much of your hurt and disappointment is coming from the fact that his feelings didn't change which is very understandable. However, the best thing you can do to protect yourself is to not have contact with him at all. My ex was the one that walked away and I had to enforce boundaries of no contact, etc. He wasn't happy when I unfriended him because he wanted to be friends, something that wasn't going to work for me. Staying friends with him would be like rubbing salt in the wound for you which is NOT what you need.
My ex immediately moved on to another relationship and I had to keep reminding myself that what he was doing was none of my business. If I do see him, I refuse to engage in conversation with him because it hurts too much...even after almost a year and half. It's very hard but to an extent you have to separate yourself from your pain and look at what's good for you in the long run rather than what you want in the moment. Instant gratification is rarely helpful.
I'm truly sorry you're going through this. Hang in there, the pain will get better, it takes time.