If you wish to increase the amount of time spent with him, then make sure to take it slow. You certainly don’t want him to feel pressured.
Time to pull out the handy city guide and start making plans to get out… by yourself!
OK I know that sounds odd, but hear me out. I’m trying to help, so just hear me out.
This will actually serve to show you truthfully what kind of relationship you have here. The hurdle of getting on the bus, to go to his place and vice versa can be used as a very convenient excuse. So first, just remove that excuse altogether. Don’t put pressure on the relationship in that area.
Instead, armed with your handy city guide, make plans to go to the art museum, the zoo, an outdoor summer park concert, the botanical gardens… you get the idea. Then call him up, and let him know that you are going, and that you’d like for him to come along. Don’t put pressure on him to fulfill an actual date (or to get on the bus). Just letting him know that you’ll be out and about enjoying life is all you need to do.
Then, after a few excursions, one or two extras per week, you’ll discover very quickly if he want s to spend more time with you or not. And you can accomplish this without ever having to put pressure on him to commit to extra time. Let his actions and responses speak to the questions you have.