@dseg97,
Have you been talking or intimate. I just seem to think that your fear and stating "your loyalty" . Or, "your loyalty" telling him you are not seeing anyone else and don't intend to, yet, " you are just talking for 4-5 months".
If you want an honest opinion, advice, you need to be more specific.
As for not wanting to hurt him like his ex did. Are these words that have come from him and him alone? "My ex hurt me, she cheated" etc. Or have you confirmed this outside of just his words. I don't want to burst a bubble but this part is important.
Lastly, " you are willing to give it all to him". Why? What has he done for you, you seem sheepish that you aren't sure where this is going, worried even, yet want to give him everything. This is usual in my opinion, for someone whom feels sorry for someone, what they "supposedly went through" and then, we feel so sorry for them and want to give everything.
Can you elaborate a bit more sweet. Then we can I think, give you that advice.