1. RELIVE YOUR FIRST DATE
It's sweet and simple without being too mushy. Odds are, it's one of the first moments where you started to fall for each other. Now it can be the moment where you commit to forever with each other. Just because he's a guy doesn't mean he doesn't like a little romance now and then.
2. MAKE A TREASURE HUNT
What better treasure is there than spending your lives together? Leave notes and clues in places that have some relevance to your relationship or his interests. He'll be eager to find the prize at the end. THEN, when he finally reaches the end of the hunt, have the last note be the proposal.
3. TRY SOMETHING NEW TOGETHER
Guys may not like a big public proposal, but they'll love having it incorporated into a new experience. Perhaps he's always wanted to hike in a certain park or try surfing. No matter what it is, do it together. At the end of the day, propose to him and tell him you want to spend your life experiencing new things with him.
4. COOK ALL HIS FAVORITES
Food really is the way to a man's heart. Pick a day where you'll both have plenty of time to enjoy the meal. Cook his favorites and have a romantic candlelight dinner or even a picnic. If you're not a great cook, use a nice restaurant delivery service like Waitr. OR, simply go to his favorite restaurant.