What’s wrong with me? [The Plant Says]

What’s wrong with me? [The Plant Says]

In winter, this plant was nothing but bare "woodiness". Come spring it was the healthiest I've ever seen which I thought was thanks to moving it into the house & placing it near a North facing window, (it was a beautiful mosaic look for such a long time!). I guess because of it's complete 360 I expected it to come back again because I haven't changed a thing, (regular watering), except I gave it indoor plant food 2 weeks ago but it was already looking sad. What's going on?! I considered maybe it needs a new pot? I can't "take it outside" because it'd be fried in this heat :\
Pretty tulips

Pretty tulips

Seed starting the thrifty way

Seed starting the thrifty way

Mystery Plants and Other Stuff

Mystery Plants and Other Stuff

weird weather

weird weather

I gave you an inch, you want a house with a yard.

I gave you an inch, you want a house with a yard.

Purple Jumanji flower??!!

Purple Jumanji flower??!!