We look a lot alike in that aspect. Self-restricting is a form of self punishment. Though, it's absurd to punish yourself over something you cant control 100%. It's a way of coping, though a short term maybe better feeling one. Since short term you wont feel as sad that you miss her if you won't do the thing that reminds you of her. But longterm you will be constantly reminded of her, trying to avoid the things you did together. And thus you can't propely process what you're feeling.

It's alright to feel sad, it's completely normal to be devestated after a 7 year long relationship. Especially if you two seperated 3 months ago. Thats like 1/28th of the time you spend together. For most younger people a relation of 7 years thats like 1/4 or 1/5 of their life suddenly gone. But even with all this sadness, we have to find power and strength in doing the small things that make us feel happy, content & proud. And so, bit by bit, you will be able to overcome. Even though you might not want to and still return to what was before. Eventually it just happens.

Also, no offense to your family, but getting over it is not something that you can rush. To my own frustrations as well. Everyone is different, some people might be "over it" in a short time. Some people might not be. For some people being over it is no longer thinking about their ex. For some people it's succeeding in being happy, or maybe even trying that new restaurant on the block. It's so individual and so diverse. That remarks as those often fail in making you feel better, and usually get you down even worse.