It sounds like you two are doing some experimenting together, which is great! It's possible you are orgasming from manual sex, as orgasms don't always feel the same way from day to day. If you're interested in learning more about that, this is a great place to do so:
Sexual Response & Orgasm: A Users Guide . If you and he are interested in experimenting with the sensations sex toys might offer, there are ways to safely D.I.Y them without needing to be old enough to access a sex toy store:
D.I.Y. Sex Toys: Self-Love Edition
If you can, it may help to stop thinking in terms of having "ruined" something or somehow being at fault. You found a way to masturbate that worked for you, and now you're trying to find some other things that also feel good and help you orgasm. There's no guarantee you'll be able to retrain your body, but you may find that the more you try other things the more you find other types of sensations that work for you. Too, continuing to experiment on your own with other ways of masturbation is an option as well. Do those things feel doable to you?