OP, do you have access to a round pen, arena, or other smaller enclosure? I find that working on catching issues in a controlled environment first helps get the ball rolling.
I turn the horse loose in a smaller pen, and let him relax and investigate if he's excited. Doing some groundwork before turning him loose can get him thinking about you and paying attention if he acts "wired".
Once he's loose (with a halter on, for now), approach his shoulder. Keep walking closer, lead rope in plain sight, until he looks at you. When he looks at you, walk away from him until his attention wanders somewhere else, then approach again. Don't be sneaky about the approach, just walk purposefully to his shoulder. If he walks away without looking at you, follow him at the same purposeful walk until he looks at you, then walk away. Eventually, every horse I've ever tried this with has graduated on his own to taking steps toward the "catcher" when he realizes that giving the catcher his attention releases the "pressure" of being approached.
If he stands and ignores until you actually get to his shoulder and catch him, cool. Do the same as you would if he turned or stepped toward you, explained below.
When you do catch him, snap on the lead, rub his head, treat him if you want, then turn him loose and try again. Turning him loose soon after catching will interrupt that "catch = work" pattern.
After he can catch you in the smaller area, try it in a more open setting, with distractions like grass or buddies, to try a more realistic situation.
Another option is the "Join-Up" technique; do Join-Up to encourage the horse to seek rest with you. It was described in great detail in another recent catching thread.
Best of luck!