Anon regrets their complacency

No. 16346143
[a photo of a tall, cylindrical white boiler and a short, blue furnace in a brightly lit brick walled basement. A mess of silver pipes extend from and above the pair and a thin puddle encircles them.]
okay /x/, l've got something to share with you
be me
last night
lying on couch, watching some tv show
shitty weather, raining and cold after 3 weeks of unbearable heat wave
all of a sudden I hear someone inhale and cough
shit my pants at that moment since I know that I'm the only one in the house, girlfriend is pulling night shift
turn down TV, can't hear anything
shrug it off as sound from TV or my mind playing tricks, it was pretty late
10 minutes later I hear footsteps
ohfuckmyfuckinglife.jpg
now I'm 100% sure that I'm not alone in the house
jump up, turn on the light and run to the hallway to get my bat
i grab the bat and start checking rooms
light from hallway is illuminating parts of kitchen
notice dirty tracks that lead to the basement
6 feet away from where I was lying
ohmyfuckinggod.webm
slowly open the basement door
there's no fucking light down there
go to get a flashlight
return with flashlight in one hand and a bat in the other
slowly go down the stairs
I can hear something rustling in the far corner of the basement
someone is breathing heavy and digging through stuff
I stand near the boiler
peek around the corner and I can see tall figure standing illuminated by the dim light of a street light from small basement window
scared shitless I turn off the torch in hopes he wont notice me
he was tall, I'm 6,2 and he was taller than me
anyway, as I was standing near the boiler I noticed that it was leaking all over the floor
has anyone had that kind of a problems?
can I repair it myself or do I need to call a repairman?
pic related

No. 16346909
>16346143 (OP)
Spray some flex seal on it