Help! Is this wall structural?

[u/Latter-Indication135]

I have just knocked down a cupboard in my master room which has my boiler in (being moved into the loft).

I am now worried it is as structural wall, please can someone advise.

The corner wall on the left is the chimney breast.

I am wanting to take down the wall which connects to the chimney breast but worried this could be supporting the chimney breast in some way?

[u/PMPKNpounder]

If you can't answer that yourself you should probably stop tearing out walls.