Why won’t my boyfriend of 4 years cover up a tattoo he got of his exes/child’s mother name?

I asked my boyfriend in the beginning of our relationship if he would get his exes name tattoo covered up he said yes but it’s now 4 years later and he still hasn’t got it done.
Every time I bring it up he gives me the same excuses he would tell me he will get a tattoo removal, he don’t know what kind of tattoo he want, tattoos are expensive, he can’t find a tattoo artist, he forgot he even had the tattoo (even though it’s on his chest). I don’t understand why he continues to have all these excuses. It just makes me feel like he can’t move on from his past and it’s really a turn off seeing this tattoo on his chest while we are having sex. I gave him until the end of next month to get a cover up done before I end our relationship and he still has not looked for a tattoo artist. Am I overreacting and should I just ignore the fact that he has this tattoo of his ex and he just won’t get rid of it or should I just end the relationship
Why won’t my boyfriend of 4 years cover up a tattoo he got of his exes/child’s mother name?
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