It sounds like for whatever reason he has decided that he does not want contact. You can't change that so you need to let this go for awhile. Give it a few days and then try once or twice. If you very persistent he may have lost contact for very innocent reasons and become annoyed with your contacts. He may be busy or working or any number of reasons and not able to interact right now. You have said enough right now. See if he contacts you but don't give him reasons to be annoyed. This is a new relationship and you would do well allowing him to see that you are calm under pressure. The impression that you give right now is going to last for a long time. You don't want to appear panicky because that is how he will see you
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What you are going is waiting for this guy. You say I don't want to be with someone and he comes back. There is no indication that he will ever come back. If he was your choice, then drop the guy. But you are putting your life on hold. You can't base your relationships now on him. There may be a great relationship in the near future if you move on. You may be giving too much. You shouldn't give more than you get. That may be an issue. Because you are more hurt than they are.
He is a coward. He is not answering because he doesn't feel obligated to. Sorry but he isn't a nice person. I am so sorry for your position. You will find someone who appreciates you if you let them. You won't feel this vulnerability that you feel with him because you will be getting part of someone else too. You have to let go, take time to heal, and start over with a guy who is not going to hurt you. He is a coward. He is a thing of the past. Stop texting. Appreciate who you are.