Hitting my calorie goal and exercising but still not losing weight

This is an inexact science and calorie counting is subject to a lot of human error...using incorrect entries, forgetting or neglecting to log certain things, eye balling servings or using volume measurements for things that should be by weight, overestimating exercise calories, etc.

Your situation would suggest that you are actually eating maintenance calories despite what is going into your diary.

OP, I agree that you're most likely eating close to maintenance unintentionally. I'm thinking that the most probable contributing factors could be:

1. Calorie goal too high, which can happen either through estimation issues (daily life, exercise, or both), or the possibility that you're unusual and require fewer than average calories for your demographics. (That latter's unusual, but possible.)

2. Logging issues. That's not a diss: Food logging is a surprisingly subtle skill, and most of us who've done it for a while have stumbled into some significant face-palm moments along the way. Your diary is closed. No pressure, but if you open it and say so, some of the old hands here could take a look and see if anything jumps out. Totally optional, just an offer of help.

3. Water retention (from new exercise or other factors) masking some fat loss on the scale. After 45 days, this is pretty improbable, but it's still in the realm of possibility. If this is happening, time should sort it out.

One option is simply to cut 100-200 or so calories from your daily goal, and continue your experiment for another month, see if that helps. Or, you could try to work at it from a more detailed level, with food weighing, tightening logging, and that sort of thing.

As long as you don't give up, you can find a route through this to success, I'm certain. Hang in there - I'm cheering for you!

(snip some really good advice, for reply-length reasons)

If you're serious, I'd try to only eat foods you prepared and weighed out personally. I know this is a lot of work, but ask yourself do you really want to achieve your goals?

(snip)

I'd suggest caution about cutting off social life entirely (even for a month) to lose weight, especially if not so obese that bodyweight itself is an acute physical health threat. Mental health is important, too, and social connections are therefore a good thing to sustain.

It's possible to eat out sometimes, keep choices moderate, and estimate conservatively, then still do fine. Eating out every meal, yeah, it'd probably be better to cook some oneself.

(snip more good advice)
There is a possibility you're putting on muscle, especially if you're strength training with weights, and you're slowly re-comping your body. You could be slowly gaining muscle while simultaneously losing fat. This is possible.

Sadly, in 45 days, with exercise 3 times a week, type of exercise not specified . . . this is unlikely. A half pound a week of muscle gain would be a really good result from progressive strength training for a man, maybe half that for a woman, and would normally require a calorie surplus, not a calorie deficit (among other favorable conditions that may or not apply in OP's case).

There can be some muscle-mass gain even in a calorie deficit, but it'd be even slower. On the flip side, half a pound a week would be about the slowest fat loss most people would consider satisfying, and even that could take a month or more to show up on the bodyweight scale amongst normal daily water retention fluctuations.

It's therefore improbable than any realistic rate of muscle mass gain will offset any satisfying fat loss rate on the scales.

I can't even tell you how sincerely I wish this weren't true. Unfortunately, muscle mass gain is pretty slow under the best of circumstances, but it's certainly worth pursuing. Besides, strength gain can be much faster (from better recruiting/using existing muscle fibers), and strength is useful in daily life.

(snip more good advice)