ok set up can be complicated but this is something i was thinking about. Tell her that you want to do something special for her since she is having a rough week or whatever might be happening to her at the moment. Tell her that this saturday you want her to have a "spa" day and that you two will meet up later for dinner. In the morning when she wakes up have a small gift waiting for her. Anything that she likes, some type of trinket. Then with a note let her know you love her and that her ride to the spa will be there soon. Introduce the limo. In the back seat another small gift/treat. If she loves peanut butter cups buy some, or if she likes choclate covered strawberries use that. Make it seems that this is her day to be pampered. Once at the spa, she gets the massage etc. The limo picks her up and low and behold another small gift/letter. She should be kinda hungry by this time so when the limo drops her off it will be at say Nordstroms or some nice store. There you will have a personal shopper there waiting for her. She'll show her to a room and there will be a light lunch and a note saying that she has a personal shopper there courtesy of you and that she has picked out some items for you to look at. Make sure the shopper knows her style before hand and if money is a lil tight explain the situation. They do this sort of thing so it's not a super weird request. Ok so she finds a dress that she likes, and is ready to go home. Once again the limo and a little gift/note. in the note tell her that you hope she has enjoyed her day and that you look forward to seeing her tonight. Let her know to wear her new dinner dress and that the limo will pick her up at "x: time. Once she gets in her place,make sure some candles are lit, soft music, aromatherapy you know what she likes so use it. Again a little gift or treat. Dinner time rolls around and the limo comes, now instead of another gift in the limo, you are there with her favorite types of flowers. Go to dinner, a place that is her favorite, or the first place you told her you loved her. eat, drik, be maerry and and then go back to her place. take her inside and have another little gift on the table. tell her to open it. This gift will be empty. When she turns around with a look of confusion she'll see you on your knees with the ring box open in your hand. At thsi point tell her that this is one gift you wanted to see her open, then confess to her about why you love her and the whole proposal. Its complicated, its difficult to execute, but it shows tremendous effort and that's the way i would have done it.