Breakups can be so rough, especially when they take a friendship we valued with them. But, I'm glad you've been able to get over it at your own pace!
It's tricky to give you advice around what happened in the break-up, because it sounds like he was pretty vague when he ended things. And, as frustrating as it can be sometimes, there's no guaranteed set of behaviors that means you'll never get broken up with again (or need or want to break up with someone else). The best you can do is try to build a healthy relationship that works for you and your partner: Hello, Sailor! How to Build, Board and Navigate a Healthy Relationship
When it comes to meeting new people, is it more that you're not interested in online dating (which would basically be off the table anyway, given your age), or that you're also not interested in making friends or getting involved in groups or hobbies that take place online?
Too, since you mention patience in your post title, something that can make you feel less like you're just waiting around for your next boyfriend is to focus your time and energy on relationships with friends, family, and yourself. Is that something you've been doing lately?