The real lion in your path right now is that you don't trust yourself, and your own conclusions. That said, here is a partial list of things you might look for:

1. Does he care not only for you, but for others generally - his parents, his siblings (if any) - and others. Does he hope that people throughout the world are happy? Does he try to help those who are less fortunate? >

2. Is he a giving person not only to you but to others? (ie, not selfish with his time, money, and so on.) >

3. Is he responsible in an adult way? In other words, if he has a job, that's a start. If he's financially stable, does he take care of those he's financially responsible for (if he had kids, or maybe he has disabled parents who need a little money help from him, etc.). Or does he only have a job to satisfy his own hobbies like alcohol, video games, and so forth.