Is this a load bearing wall? Please help
I would definitely assume the wall is supporting that beam. Get a structural engineer's advice to be sure, and to find out what your options might be. Solutions often exist, but may not be DIYable... and this is emphatically not something you want to risk getting wrong.

For comparison: My contractor was able to open a 15-foot-wide passageway through a central loadbearing wall, but we needed to install a heavy (4x12?) Parallam beam to absorb the load, strong columns at each end to transfer the load downward, and at the non-foundation end a steel C-beam was sistered to an existing joist to transfer load to foundation and main beam.