I've been with my girlfriend for close to 10 years, we met in college and I was her first.

We both work a full time job and barely have had time for each other.

Recently, my gf travelled to her cousin's house to support the death of her cousin's husband suicide

Reason for the suicide? Gf's cousin cheated on him with multiple men and drove him depressed.

Gf's cousin also has a reputation of being a homewrecker and even encouraging slutty behavior/cheating with her female friends.

I felt really uncomfortable about the situation but I wasn't about to say "no you can't go support your cousin after she just lost her husband"

So she ends up leaving and has been pretty distant with me over the phone since.

Fast forward to few nights ago, I call her phone at 7:30PM to check in and say good night. She did not pick up.

I call her again at 11:00PM, still did not pick up or text me.

I'm a little worried at this point, because, she's always been the person to text me "good morning/night" and is usually hyper responsive to texts/calls.

I try not to let it bug me and go to bed.

Fast forward to the next morning, and I still do not receive any contact.

At this point, i'm worried about her safety instead of her loyalty, since this behavior extremely unusual.

I call/text her a few more times throughout the day, asking if she's alive and well

I then notice that my only some of my calls started going straight to voicemail (this happens when the person puts their phone on Do Not Disturb), but my gf is not familiar with this feature if she turns it on.

I finally receive a text back at 4PM, apologizing that she has lost her phone.

I call her immediately. She did not pick up.

She texts me back again at 6PM, saying "sorry I'm just mentally exhausted, can you text me instead"

I just called and texted her throughout the night and day because I thought something had happened to her, and she tells me to text her instead?

I just ignore her text completely and haven't received any contact since.

This lady also just flat out lied to my face, saying she "lost her phone" when she put it on "Do Not Disturb" mode in the middle of the morning??

I have a terrible gut feeling that she cheated, but, my blue-pill mind is actually trying to give her the benefit of the doubt.

I know for a fact if this was one of my friend's situation, i'd tell him to assume the worst and hard next her.

I guess i'm looking for the same.

Please talk some sense into me.