Trouble selecting the objects when i try to select a house or the walls or any object that i have made it just doesn't get selected until i click exactly in the middle. it's so annoying because i have to click few times to select the object that i want.  i opened a new project and it works just fine anywhere i click on the object it gets selected. but in my main project file it just doesn't work. maybe i turned on something? i don't know
You can change the selection style by left clicking on the select mode for several seconds and a selection mode menu will appear.  But this may not be the issue you're encountering...